3rd Rock from the Sun (sometimes referred to as simply 3rd Rock) is an American sitcom that aired from 1996 to 2001 on NBC.
 The show is about four extraterrestrials who are on an expedition to Earth, which they consider to be a very insignificant planet.
 The extraterrestrials pose as a human family to observe the behavior of human beings.
Joseph Leonard Gordon-Levitt ( ; born February 17, 1981) is an American actor, filmmaker, singer and entrepreneur.
 As a child, he appeared in the films "A River Runs Through It", "Angels in the Outfield" and "10 Things I Hate About You", and as Tommy Solomon in the TV series "3rd Rock from the Sun".
 He took a break from acting to study at Columbia University, but dropped out in 2004 to pursue acting again.
 He has since starred in "(500) Days of Summer", "Inception", "Hesher", "50/50", "Premium Rush", "The Dark Knight Rises", "Brick", "Looper", "The Lookout", "Manic", "Lincoln", "Mysterious Skin" and "".
 He starred as Philippe Petit in the Robert Zemeckis-directed film "The Walk" (2015), and as Edward Snowden in the Oliver Stone film "Snowden" (2016).
 For his leading performances in "(500) Days of Summer" and "50/50", he was nominated for the Golden Globe Award for Best Actor – Motion Picture Musical or Comedy.
10 Things I Hate About You is an American television sitcom broadcast on ABC Family beginning in 2009.
 Developed by Carter Covington, the show is a half-hour, single camera series based on "Ten Things I Hate About You".
 It premiered on Tuesday, July 7, 2009 at 8 pm and brought in 1.60 million viewers, a record for a 30-minute comedy debut on the ABC Family network.
Wayne Elliot Knight (born August 7, 1955) is an American actor and comedian.
 He is known for playing Newman in the TV sitcom "Seinfeld" (1992–1998) and Officer Don Orville in "3rd Rock from the Sun" (1996–2001).
 His other roles include Dennis Nedry in "Jurassic Park", Stan Podolak in "Space Jam" (1996), Al McWhiggin in "Toy Story 2" (1999), Tantor in "Tarzan" (1999), the Giraffe in "Bee Movie" (2007), Zack Mallozzi in "Rat Race" (2001), Dojo in Xiaolin Showdown (2003–2006), Mr. Blik in "Catscratch" (2005–2007), Microchip in "" (2008) and Haskell Lutz in "The Exes" (2011–2015).
David Krumholtz (born May 15, 1978) is an American actor.
 He played Charlie Eppes in the CBS drama series "Numbers".
 He played Seth Goldstein in "Harold & Kumar Go to White Castle" and its two sequels, "Harold & Kumar Escape from Guantanamo Bay" and "A Very Harold & Kumar 3D Christmas".
 He is also known for his role as Bernard the Elf in "The Santa Clause" and its sequel, "The Santa Clause 2".
 Additionally, he is known for his role as Mr. Universe in the 2005 film "Serenity" and played Michael the AV geek in "10 Things I Hate About You".
 In 2016, he provided the voice for Kareem Abdul Lavash in the adult animated film "Sausage Party".
10 Things I Hate About You is a 1999 American romantic comedy film directed by Gil Junger and starring Julia Stiles, Heath Ledger, Joseph Gordon-Levitt, and Larisa Oleynik.
 The screenplay, written by Karen McCullah Lutz and Kirsten Smith, is a modernization of William Shakespeare's late-16th century comedy "The Taming of the Shrew", retold in a late-1990s American high school setting.
 In the story, new student Cameron (Gordon-Levitt) is smitten with Bianca (Oleynik) and, in order to get around her father's strict rules on dating, attempts to get bad boy Patrick (Ledger) to date Bianca's ill-tempered sister, Kat (Stiles).
 The film is titled after a poem written by Kat about her bittersweet romance with Patrick.
 Much of the filming took place in the Seattle metropolitan area, with many scenes shot at Stadium High School in Tacoma.
Ian David Lithgow (born 3 February 1972) is an American actor, best known for his work as Leon in the NBC's series "3rd Rock from the Sun" (1996–2001).
Shay Astar (born September 29, 1981) is an American actress, singer, and songwriter.
 She is best known for her work in the late 1990s, portraying the neo-feminist August Leffler, a semi-regular character on the sitcom "3rd Rock from the Sun".
 She played Elizabeth in the Halloween comedy film "Ernest Scared Stupid" and Paula Kelly in the "Boy Meets World" episode "I Am Not a Crook".
 Astar portrayed Isabella, the imaginary friend of a young girl aboard the "Enterprise" in the "" episode "" in 1992.
 In 1996, she played Andrea on the cartoon series "The Oz Kids".
Dr. Richard Solomon, usually known as Dick Solomon, is a character played by John Lithgow in the late 1990s NBC sitcom "3rd Rock from the Sun".
 Solomon is the High Commander of a highly trained alien unit, sent to Earth by their leader, The Big Giant Head.
 His crew is made up of Sally Solomon (played by Kristen Johnston), Harry Solomon (played by French Stewart), and Tommy Solomon (played by Joseph Gordon-Levitt).
 In the first episode, "Brains and Eggs", Dick states that he has made a home of a "third rate planet, has a job at a third rate university, and now we are looking at a third floor apartment."
Benjamin Stone (born 3 April 1987) is a British actor.
 He has a twin sister.
 He is known for playing "Alek Petrov" in "The Nine Lives of Chloe King", and William "Blank" Blankenship in the series "10 Things I Hate About You".
 He is also known for being a voice actor in four of the Harry Potter video games.

Question: What did the actor who played Cameron in 10 Things I Hate About You play on 3rd Rock from the Sun?
Answer: Tommy Solomon