The Big Bang Theory The Big Bang Theory is a CBS ( current owner of the " Star Trek " franchise ) sitcom about four science nerds and the hot girl who lives across the hallway . The four scientists are rabid science fiction fan s and collectors of memorabilia thereof , " Star Trek " in particular , resulting in the show featuring a constant flow of " Star Trek " references in the vast majority of the show ' s episodes . The show features Brian George and Keith Carradine as Raj ' s and Penny ' s fathers , Pasha Lychnikoff as a cosmonaut on the International Space Station , and Mark Harelik as the CalTech physics department chairman Gablehauser . " Star Trek " actors Wil Wheaton , Leonard Nimoy , George Takei , LeVar Burton , and Brent Spiner have all made appearances on the show , as fictionalized versions of themselves . Cast member Kaley Cuoco also played William Shatner ' s daughter in Priceline . com commercials , and Iris Bahr had appeared in the original unaired pilot for the show . " Wild Stacks " video slot machine . One of the payout symbols is a small pile of comic book s . Episodes . Original unaired pilot . Gilda says that she slept with Sheldon because of his completely accurate " pon farr " imitation , to which Sheldon responds with the Vulcan salute . Season 1 . " The Pancake Batter Anomaly " . Sheldon and Leonard play three - dimensional chess . " The Bat Jar Conjecture " . The episode begins with Howard announcing new info on the then - upcoming film , which leads into a discussion about alien private parts and Spock ' s conception . Later Sheldon is persuaded to join in the Physics Bowl by quoting Spock ' s dying words . Sheldon makes up TOS uniform - style shirts for his Physics Bowl team , with his teammates as redshirt s . Ultimately in the final scene , to satisfy who is smarter between Leonard and Sheldon , Penny asks multiple real - world questions for which they are only able to give " Star Trek " - like answers , including Patrick Stewart or William Shatner being the Sexiest Man Alive and Tweety Bird thinking he saw a Romulan . " The Nerdvana Annihilation " . The guys purchase a time machine prop from the movie and they decide to play with it . They wonder what time date to travel to and Sheldon suggests to Leonard that he should travel to the future to obtain a cloaking device and references . Sheldon gives the stardate of this episode as 5027 . 3 , which supposedly converts to January 10th , 2328 . The stardate is correct , but traditionally the episode is placed in 2268 . Later , Leonard threatens to open up a Geordi La Forge action figure that ' s still in its original packaging . Season 2 . " The Bad Fish Paradigm " . Leonard compares his dating a woman to Raj and Howard ' s not dating anyone as " approach is warp speed . " Later , Sheldon asks Penny if she speaks Klingonese . " The Codpiece Topology " . Sheldon Cooper goes to a Renaissance fair dressed up like Spock pretending he ' s on a planet with a Renaissance theme due to the fair ' s complete disregard for historical accuracy . " The Panty Pinata Polarization " . The gang plays Klingon Boggle , with a copy of " The Klingon Dictionary " on hand . Howard claims that the Yiddish culinary dish kreplach is also a hearty Klingon dumpling . " The Lizard - Spock Expansion " . Sheldon expands the game of Rock - Paper - Scissors with additional options of " Lizard " and " Spock , " the latter symbolized by the Vulcan live - long - and - prosper hand gesture . It was used initially to determine whether or not to watch . Later , Sheldon and Raj argue whether or is the worst " Trek " movie , and whether or is the best . " The White Asparagus Triangulation " . Sheldon compares Dr . Stephanie Barnett as the Leonard McCoy to their social group ' s " landing party " and gives a somewhat off version of the Vulcan salute when he notices her observing the conversation . " The Bath Item Gift Hypothesis " . Penny gives Sheldon a used napkin autographed by Leonard Nimoy as a Christmas present . She apologizes because Nimoy wiped his mouth with it , but Sheldon is even more grateful , as now he has Nimoy ' s DNA . " The Dead Hooker Juxtaposition " . Penny compares the main characters ' social naivete to not knowing how to put up their shields like on " Star Trek " . " The Hofstadter Isotope " . Sheldon says Leonard had been watching by describing it as " the " / " crossover episode . " " The Vegas Renormalization " . Sheldon ' s frequent answer of Spock during Twenty Questions . " The Classified Materials Turbulence " . Leonard says that Howard ' s zero - gravity toilet for the International Space Station will allow its crew " to boldly go where no man has gone before . " Season 3 . " The Electric Can Opener Fluctuation " . Penny references as part of her comforting of Sheldon after he learns Leonard , Howard , and Raj had faked his discovery of magnetic monopoles in order to keep him happy . Sheldon wears a goatee resembling the one wears in . A recurring joke is Sheldon ' s " Vulcan hearing . " " The Creepy Candy Coating Correlation " . Sheldon states he used to be a Wil Wheaton fan until Wil abruptly pulled out of a convention Sheldon had traveled ten hours by bus to attend and get his autograph . During a customizable card game tournament Wil is participating in , Sheldon constantly quotes Khan Noonien Singh from . " The Adhesive Duck Deficiency " . Trying to get Sheldon to drive faster , Penny says , " Warp speed ahead , Mr . Spock " , to which Sheldon replies that that order would never be given to the science officer , but to the navigator / helmsman instead . " The Bozeman Reaction " . Sheldon moves to Bozeman , Montana , which is where the " Phoenix " had been launched , after the apartment is burglarized . He says " " Live long and prosper " " and gives the Vulcan salute in a farewell video . " The Excelsior Acquisition " . Sheldon reveals that Leonard Nimoy took a restraining order out against him after receiving one from Stan Lee . Additionally , when Leonard is asking Penny to guess who Stan is , she incorrectly assume he was on " Star Trek " . " The Precious Fragmentation " . Howard says he knows a guy who can obtain black market phaser s and panties worn by Nichelle Nichols on the show . " The Pants Alternative " . Sheldon compares himself to the William Shatner of science after questioning why Shatner was not in . " The Wheaton Recurrence " . Wil Wheaton returns for a bowling game . Sheldon names their team " The Wesley Crusher s . " Later , Howard asks Wil if he had sex with Whoopi Goldberg . " The Staircase Implementation " . As part of Sheldon ' s " first barrier to roommatehood , " he asks Leonard " Kirk or Picard ? " Leonard replies " " " over " " , but Picard over Kirk . " " The Lunar Excitation " . As Howard and Raj , having secretly signed Sheldon up with an online dating service , try to convince him to at least meet the woman he has been matched with , Raj reminds him that even Spock dated once every seven years , so Sheldon quickly shoots back that " pon farr " had nothing to do with dating : " His blood " boiled " with mating lust " . Season 4 promotional ads . In one , Sheldon builds an " Original Series " transporter to beam them ( with " Next Generation " - style visual effects ) from their old Monday night timeslot to Thursday . In another he and Leonard again play three - dimensional chess while discussing the move . Season 4 . " The Hot Troll Deviation " . Howard has a model in his room . An imaginary George Takei ( wearing his costume from ) appears and laments being typecast as Hikaru Sulu . " The Apology Insufficiency " . The proof that Sheldon ' s dreaming is a Gorn sitting on the couch reading a magazine . He later compares his problems with Howard ' s refusal to accept his apology to the Kobayashi Maru scenario . " The 21 - Second Excitation " . Leonard mentions how they all waited fourteen hours to see . Later , when Wil Wheaton jumps the line to see " Raiders of the Lost Ark " , Sheldon quotes Picard ' s " " The line must be drawn " HERE ! " line from . " The Boyfriend Complexity " . Sheldon comments that he doesn ' t care for novelty editions of " Monopoly " , preferring the regular and Klingon ( which didn ' t exist at the time of the episode ' s original airing ) editions . Howard and Raj play a game of " Star Trek " - themed battleships . When Howard notices that two squares are a hit but the one in the middle is a miss , Raj comments that his starship has a hole in the middle . When asked what starship has a hole in the middle , Raj says " " a Romulan battle bagel . " " " The Alien Parasite Hypothesis " . Sheldon suggests that Amy use " kolinahr " to suppress her new - found sexual arousal after asking her if she ' d seen and then says not to . " The Bus Pants Utilization " . Sheldon ' s passive - aggressive stance against the guys for kicking him out of their app design team includes playing the " Original Series " theme on a theremin . " The Love Car Displacement " . Leonard uses the Romulan Neutral Zone as a metaphor for how he and Penny will share a bed without becoming intimate . When he suggests they do get intimate in the context of how often the Neutral Zone was entered by both the Federation and Romulan Star Empire , Penny says she ' s raised shields over the lower half of her body . " The Thespian Catalyst " . Sheldon and Penny act out a fan fiction story he ' d written as a child where he ' s whisked away to the 23rd century , with Penny playing Spock . She perfectly executes the hand salute at one point . " The Toast Derivation " . Sheldon invited LeVar Burton over to the apartment via Twitter . At the end of the episode , he sticks his head in and gets too weirded out by the sight of three other guys singing karaoke . He then leaves and says he ' s so done with Twitter . " The Prestidigitation Approximation " . Leonard says to Priya that the only " Star Trek " uniforms he has are the everyday and dress ones from the " Original Series " , and then she reveals that Raj has an Uhura dress when Leonard suggests she wear one . " The Zarnecki Incursion " . Sheldon carries a " bat ' leth " with him to the house of the guy who hacked his " World of Warcraft " account . " The Agreement Dissection " . Sheldon cites as his inspiration for blackmailing Leonard into signing a new roommate agreement that favors him . He then shows an okudagram - styled auto - destruct - esque countdown timer on his laptop showing how much time Leonard has before Priya ' s parents are emailed about her dating Leonard . Sheldon then tells her that while she may have gone to the Faculty of Law at Cambridge University , he ' s an honorary graduate of Starfleet Academy . " The Wildebeest Implementation " . Sheldon ' s three - player variation of chess includes a space designated as a transporter pad . " The Roommate Transmogrification " . Raj overhears Leonard and Priya having an " Original Series " - themed sex fantasy . Season 5 . " The Russian Rocket Reaction " . Wil Wheaton throws a party at his house , which has a painting of him as Wesley Crusher in uniform and an " Enterprise " - D model . Raj says he talked with Alice Krige ' s gynecologist , referring to Alice as " The Borg Queen From " " . " Wil gives Sheldon an autographed still - in - package Playmates Toys Wesley action figure , but Brent Spiner promptly opens it upon seeing it . Brent then offered Sheldon a autographed still - in - package Data action figure to make up for it , but Sheldon declines and declares Brent his new mortal enemy . In the background at the party are " Star Trek " writers D . C . Fontana and David Gerrold . They can be seen talking with Kevin Sussman , who plays the show ' s character Stuart Bloom , who owns a comic book store the main members of the cast frequent . The street address of Wil Wheaton ' s house ( as seen on the front porch as the gang arrives at the party ) is 1701 . " The Rhinitis Revelation " . There ' s a " Next Generation " tricorder displayed on the bookcase behind the couch . " The Recombination Hypothesis " . Sheldon ordered a life - size cardboard standee of Spock for his room , but the company sent him , prompting him to snarl " " Live long and suck it , Zachary Quinto ! " " " The Vacation Solution " . Bernadette had rejected Howard ' s suggestion to have wedding invitations in Klingonese . " The Rothman Disintegration " . Kripke has Sheldon explain Rock - Paper - Scissors - Lizard - Spock to him at least three times to mess with him . Sheldon later proposes a trivia contest with " The Original Series " , " The Next Generation " , " Deep Space Nine " , and " Voyager " being four of the five categories . " The Weekend Vortex " . Amy mistakenly refers to the Star Wars video game the guys are playing as a " Star Trek " video game . Penny corrects her , saying the guys don ' t like when the two franchises are mistaken for one another , and even suggesting there is no difference between the two . " The Transporter Malfunction " . Penny bought Sheldon and Leonard a mint - in - box 1975 " Star Trek " transporter toy each . However , they refused to play with them as the toys would lose some of their perceived value within toy collector circles . That night , Sheldon dreamed that his Mr . Spock action figure ( voiced by Leonard Nimoy ) told him that it was illogical to own a toy that he wouldn ' t play with . Shortly afterwards , Sheldon accidentally broke his transporter while playing with it and then replaced it with Leonard ' s . Later , he had a nightmare about being chastised by Mr . Spock about his actions and was subsequently attacked by a Gorn . Appropriately chastened , Sheldon confessed his guilt to his roommate . " The Hawking Excitation " . Howard says " no " in Klingonese when telling Sheldon that he wouldn ' t introduce him to . " The Stag Convergence " . Sheldon tells Wil Wheaton ( who said he was attending Howard ' s bachelor party because it was a welcome alternative to George Takei ' s hot tub parties ) to " talk to the hand " and gives him the Vulcan salute . " The Launch Acceleration " . Howard tells Raj " " You watch " Star Trek " , I live it " " when discussing Howard ' s aborted mission to the International Space Station . Leonard and Sheldon again play three - dimensional chess . Later , Leonard comes home to find Sheldon and Amy playing " " Star Trek " doctor " with Sheldon uncomfortably lying on the couch while Amy , dressed in a sciences division blue " Original Series " women ' s uniform , pretend - scans him with a toy medical tricorder . " The Countdown Reflection " . Despite his initial offer to do so being soundly rejected , Sheldon performs part of Howard and Bernadette ' s wedding in Klingonese and says " and the Klingon High Council " when pronouncing them man and wife . When the rocket is launched , Sheldon quotes the title sequence from " The Original Series " saying " " Boldly go , Howard Wolowitz " " . Season 6 . " The Habitation Configuration " . Sheldon tries to do a segment on " Trek " flags on his " Fun With Flags " web show , first with Wil Wheaton ( who keeps trying to do a bit on the Federation flag much to Amy ' s dislike ) and later with LeVar Burton , telling his viewers to " set phaser s to fun . " To get Amy to see things his way in the matter , Sheldon gives her the " TNG Complete Series DVD Boxset " and briefly describes to her through her closed apartment door . Wil ' s house number is 1701 , the " Enterprise " s hull number . " The Fish Guts Displacement " . Amy suggests that Sheldon punish her by not letting her see the new movie . " The Bakersfield Expedition " . While driving to the Bakersfield , California Comic - Con , the guys stop at Vasquez Rocks to pose for photos in their costumes : Leonard as Picard , Sheldon as Data , Raj as Worf ( all in the Season 3 uniforms ) , and Howard as a Borg . After their car gets stolen , Sheldon states that they ' re all a landing party . When the group has to rent a car to return home , Raj asks if the car can be from " Enterprise " ( named for the World War Two aircraft carrier ) . On an ancillary note , Chris Hemsworth ' s Marvel Comics character Thor becomes a point of argument for Penny , Amy , and Bernadette . " The Contractual Obligation Implementation " . Sheldon names " Star Trek " writer D . C . Fontana as a woman who had to use her initials to hide her gender in her field of work . " The Love Spell Potential " . Sheldon says he ' s tired of Leonard always invoking Zachary Quinto whenever Sheldon doesn ' t like an impending change . " The Bon Voyage Reaction " . Sheldon explains his personal trick to overcoming his social anxiety was to picture everyone as a " Star Trek " character . Apparently Raj is " Uhura " while Leonard is " Unnamed Crew Member In A Red Shirt " . Season 7 . " The Hofstadter Insufficiency " . During Leonard ' s absence , Penny and Sheldon play a game of 3D chess . Sheldon also starts to ask Penny about Starfleet captains , before being cut off by her . " The Discovery Dissipation " . To help Sheldon feel better about Leonard disproving his discovery of a new element , Wil Wheaton comes by and tells Sheldon that for a while he regretted being Wesley Crusher . Season 8 . " The Misinterpretation Agitation " . Sheldon offers a beverage to a Dr . Oliver Lorvis after he admits his intention to give some flowers to Penny . Later when receiving his drink , he compliments Sheldon ' s " Star Trek " mug and mentions that he got an original phaser , having given Gene Roddenberry a vasectomy . " The Champagne Reflection " . Sheldon introduces LeVar Burton for the final " Fun With Flags " webisode by saying he " puts the Geordi in your La Forge . " Later LeVar says he should ' ve taken Wil Wheaton ' s advice about getting a gate for his house when Sheldon tells him the web show ' s been resurrected . Season 9 . " The Spock Resonance " . Wil Wheaton and Adam Nimoy come over to interview Sheldon for Adam ' s documentary about Leonard Nimoy . This was an instance of art imitating life , as Nimoy was at the time actually preparing a documentary on his father , which was released one year after the episode in 2016 as " For the Love of Spock " . Sheldon tells the pair that the episode that really had meaning in his life was . During their visit , Sheldon presents the napkin complete with Nimoy ' s DNA that he received from Penny as gift in the second season " The Bath Item Gift Hypothesis " . " The Opening Night Excitation " . Sheldon has a poster for in his room . Wil Wheaton goes back to evil mode by showing up at the movie theater showing " Star Wars : The Force Awakens " ( co - produced by Bad Robot Productions , directed by J . J . Abrams , and has the trailer showing before it ) dressed as Spock . Season 11 . " The Retraction Reaction " . Sheldon opens up his stash of Romulan ale ( blue - dyed vodka ) for a depressed Leonard . Penny later joins them and claims that while she doesn ' t know who the Romulan s are , they sure know how to party . " The Relaxation Integration " . Sheldon tells Amy that he will appear at their wedding with a tuxedo over a Star Trek uniform . " The Explosion Implosion " . Leonard owns a Captain Kirk shirt , which needs to be dry cleaned . " The Proton Regeneration " . Sheldon competes with Wil Wheaton for a role in a remake of " Professor Proton " . Wheaton gets the part is put back on Sheldon ' s list of enemies .