Diana Giddings Lieutenant Diana Giddings was a Starfleet officer and junior engineer aboard the . Her quarters were located on Deck 7 , room number 3255 . ( ) Service history . 2364 . Giddings was working in engineering when Q appeared for the first time aboard the " Enterprise " - D in 2364 , and was later seen in a marketplace in Farpoint Station on Deneb IV . ( ) She was affected by polywater intoxication like the rest of the crew . After working on the bridge and on the master systems display , she was seen kissing a male crewmember in main engineering . ( ) She guarded Lutan , the ruler of Ligon II , and Hagon from the observation lounge to the holodeck where Natasha Yar showed him the aikido program . ( ) Later that year , she was present in main engineering when Kosinski and The Traveler were conducting experiments aboard the " Enterprise " - D and transported the ship to the end of the universe . ( ) She was also working in engineering shortly after the death of Lieutenant junior grade . ( ) She passed the starboard lounge when Data entered to talk to Captain Jean - Luc Picard while the ship was in orbit of Rubicun III . ( ) She was manning an aft console of the bridge when Captain Picard was under the control of a Ferengi thought maker and prepared to attack the " Enterprise " - D with the ( ) and again a little later when the crew encountered Q for the second time . ( ) Giddings was seen roaming the corridors when the " Enterprise " - D was in orbit of Haven and Torona IV . ( ) She served as relief ops officer for Wesley Crusher and later as relief tactical officer for Natasha Yar when an away team beamed down to the surface of Omicron Theta . ( ) Giddings was working in an overcrowded sickbay helping treat patients for a virus from Quazulu VIII that most of the crew had contracted while in orbit of Angel I . ( ) She walked through the corridor s , close to one of the docking port s of the ship when the USS " Enterprise " - D was docked at Starbase 74 , shortly before everyone had to abandon the ship because of a faked warp core breach simulated by the Bynar s . ( ) Harry Bernard nearly bumped into her in when running through a corridor . ( ) She was on duty on the bridge and later in engineering when the microbrain from Velara III was brought aboard the " Enterprise " . ( ) Wesley Crusher nearly ran into her in a corridor while he was trying to catch up with Jake Kurland ; later she was working in engineering . ( ) She was working in engineering when Worf gave the Klingon s Konmel and Korris a tour of the ship . ( ) She was on duty on the bridge when the " Enterprise " - D was approaching the star Delos and shortly thereafter received a distress call from the Ornaran freighter " " . ( ) Giddings was doing duty on the bridge when the ship experienced time loop s in late 2364 . ( ) She was just leaving the bridge when the " Enterprise " - D reached Earth in late 2364 . She was walking along a corridor when Admiral Gregory Quinn beamed aboard the ship . ( ) She was on the bridge shortly before the " Enterprise " - D made contact with the Romulan s after decades of silence . ( ) 2365 . By 2365 she had switched to the sciences division . Giddings visited Ten Forward when Captain Picard met Doctor Katherine Pulaski for the first time . ( ) Early that year she was having a short affair with Thadiun Okona when he was aboard the " Enterprise " - D as his ship , the " Erstwhile " , was undergoing repairs . She welcomed him in her quarters , very lightly dressed . ( ) She was seen in a corridor when Data was taken over by Doctor Ira Graves , ( ) and when the ship was in orbit of Gagarin IV . ( ) Giddings was treating several wounded patients during the ship ' s system problems in 2365 . She was also present when Doctor Pulaski chewed at Ensign and helped a doctor who was helpless without the medical technology . ( ) When a crewmember of the " Enterprise " came down with the flu after a visit to Nasreldine , she helped Doctor Katherine Pulaski treat the patient . ( ) 2366 . By 2366 she had been demoted to crewman . She was working in sickbay , treating a wounded Darien Wallace , when Doctor Paul Stubbs was conducting experiments with his egg probe . ( ) She was also on duty when the injured Mintakan Liko was treated in sickbay , and later , when the anthropologist Mary Warren died aboard the " Enterprise " - D . ( ) She was on duty shortly after Marla Aster was beamed dead to sickbay and helped treat the other wounded archaeologists . ( ) She was part of the medical emergency team which transported the wounded Romulan officer Patahk to sickbay by using an anti - grav lift . Later , Giddings was working as a nurse in sickbay . ( ) Giddings was walking through a corridor towards sickbay where Seth Mendoza was treated , after he was infected by Ferengi pyrocyte s and was greeted by Commander Riker . ( ) " In an alternate timeline , created when the traveled back in time , Giddings was working in sickbay where she treated the wounded " Enterprise " - D crewmembers . " ( ) She was chatting with Deanna Troi in a corridor shortly after Data was abducted by Kivas Fajo and was walking past Troi and Worf in a corridor shortly after the biennial Trade Agreements Conference . ( ) 2367 . She was seen passing by Jono ' s guest quarters aboard the " Enterprise " - D when Captain Picard was visiting the boy after he had been released from sickbay . ( ) She walked through a corridor an a little later that year and passed Worf and Alexander Rozhenko , taking an extra look at the young Klingon . ( ) Giddings was walking along a corridor in mid 2367 , smiling , when she saw Data , who was in costume as Ebenezer Scrooge and again walking along a corridor when Doctor Crusher told Captain Picard about strange occurrences in sickbay , due to the Paxan s erasing their memories of the preceding twenty - four hours . ( ) She was sitting in Ten Forward , in civilian clothing , enjoying a drink with several other crewmembers shortly before a fight broke out in the bar due to a lack of REM sleep . ( ) Giddings was working in sickbay when Dr . Crusher and Nurse Ogawa treated Susanna Leijten . She brought Dr . Crusher something to drink . ( ) Off duty she visited Ten Forward and was talking to a science officer when Geordi La Forge slopped his drink on Chief O ' Brien . ( ) She was in attendance of a concert of classical music in Ten Forward in late 2367 sitting at a table together with Miles O ' Brien . 2368 . She was a friend of Keiko O ' Brien ' s . When Data , Miles O ' Brien and Deanna Troi were taken over by Ux - Mal prisoners , she was taking care of the O ' Briens ' newborn baby , Molly , while Keiko was taken hostage by the Ux - Mal in 2368 . ( ) She was on duty , carrying a small box of medical equipment walking through a corridor , when the " Enterprise " - D entered the FGC 47 nebula in late 2368 . ( ) She had a drink in Ten Forward while the Borg Hugh was held in the detention cell of the ship . ( ) Together with Ensign Martinez , Crewman Giddings was treating a patient in sickbay shortly after the " Enterprise " - D started to assist a Romulan science vessel with repairs . ( ) 2369 . Diana Giddings passed Data and Doctor Julian Bashir in a corridor shortly after Data experienced his second vision . ( ) She cared for the Bersallis III colonist s beamed aboard by Darien Wallace . ( ) Giddings was in the audience when the play " Frame of Mind " was performed in 2369 . ( ) When the " Enterprise " - D was stuck in time in a temporal fragment in 2369 , Deanna Troi nearly ran into a frozen Diana Giddings in a corridor . ( ) 2370 . Giddings was walking along a corridor , talking to another crewmember when the Iyaaran Loquel encountered a Human child , Eric Burton , for the first time . ( ) She was playing " Terrace " with another crewmember in Ten Forward shortly after Worf returned from a " bat ' leth " tournament on Forcas III . ( ) She was in Ten Forward , in civilian clothes , when the Boraalan Vorin stumbled into the bar . ( ) Giddings was present in Ten Forward when D ' Arsay artifacts started to materialize all over the ship . ( ) When the crew was beginning to feel the changes caused by Barclay ' s Protomorphosis Syndrome , Giddings , in civilian clothing , was having a drink in Ten Forward . ( ) She beamed down to Maranga IV , together with Armstrong , Alfonse Pacelli , Russell , and other " Enterprise " - D crewmembers to attend the Kot ' baval Festival . She later enjoyed a drink with a fellow crewmember in Ten Forward and left the bar when Worf started yelling at K ' mtar . ( ) Giddings was on duty in sickbay when Jason Vigo suffered from a seizure and had to be taken to sickbay immediately . ( ) Appendices . Background information . Diana Giddings was played by regular background actress and Gates McFadden ' s stand - in Lorine Mendell who received no credit for her appearances . She was seen in many TNG episodes , in the first season usually wearing the skant uniform style and working in engineering . Her name was never spoken in dialogue – the script of calls her " A well - endowed female crewmember " ; in the script of she is called a " supernumerary " – ; but was given on her door sign in the former episode . The incorrectly spelled her name as " Dianna Giddings " . Mendell reprised this role for the final " Webster " episode , titled " Webtrek " , in during the second season of " The Next Generation " . She shared her bridge scenes with Michael Dorn , James G . Becker , and Dexter Clay .