Career: A long association with the Royal Shakespeare Company began in 1966. Stewart's first small-screen role came in 1974's A Fall of Eagles, and his movie debut a year later in Tilney. His subsequent TV roles include I, Claudius, Tinker, Tailor, Soldier, Spy and Star Trek: The Next Generation, which made him a household name on both sides of the Atlantic. He returned to the stage when the series ended in 1994. Stewart has since appeared in the Star Trek movies Generations, First Contact, Insurrection and Nemesis. He's also starred in Conspiracy Theory and the blockbusting X-Men films. He made a memorable appearance in Extras, starred alongside David Tennant in Hamlet.

Career: Spiner made his TV debut in 1970 movie My Sweet Charlie, and eventually established himself as a stage actor in New York, appearing in a number of off-Broadway and Broadway plays. He had a bit part in the Woody Allen movie Stardust Memories. He moved to Los Angeles in 1984 and appeared in TV movies Robert Kennedy and His Times, Crime of Innocence and Manhunt for Claude Dallas. Spiner became a household name when he was cast as android Data in Star Trek: The Next Generation in 1987. He played the role until the movie Star Trek: Nemesis (which he co-wrote), when the character was killed off. He has also appeared in the movies Independence Day and Dude, Where's My Car? His recent work includes roles in the film The Aviator, and TV series Enterprise and Threshold.