The Rock was still just a wrestler when he played a Pendari champion (we don’t know either) in an episode of ‘Voyager’ with one of those classic ‘Star Trek’ forehead prosthetics.

The ‘Mr Robot’ star showed up very briefly on the bridge of the Excelsior in the sixth instalment of the original franchise back in 1991 thanks to his mum Mary Jo, who was casting director for ‘The Undiscovered Country’.

The actress was 11 when she appeared in the seventh season of ‘Star Trek: The Next Generation’. Her role? Hedril, who made Deanna Troi’s mum go into a coma due to her telepathic abilities.

The ‘Desperate Housewives’ star didn’t even get a credit for her performance as Lieutenant BG Robinson in ‘Next Generation’. As transporter chief, she did some solid beaming.

Yes, that is Mad Max with a shaved head in 2002’s ‘Star Trek: Nemesis’, playing the baddie who’s been cloned from Captain Picard in what is often known as the rubbish 10th one.

Back before he won an Oscar, the Canadian actor went full ham as Klingon warlord Chang in ‘The Undiscovered Country’. We’re guessing he refused the crazy hair.

Yes, really. The English diva appeared in the original series in a time travel episode set in 1930, in which she played a social worker who got off with William Shatner.

The ‘Sex and the City’ star played the crucial role of Lt. Valeris in ‘The Undiscovered Country’, a Vulcan who turns out to be a turncoat trying to destroy peace talks. She ends up getting totally mind-melded by Spock.

You recognise his face now, but for a long-time, the 66-year-old was well-known for being endlessly buried under facial prosthetics. In ‘Star Trek: Nemesis’ he’s unrecognisable as a Reman Viceroy who tried to help Tom Hardy overthrow the Romulans.

Doc Brown actually donned the make-up to play Klingon commander Kruge in 1984’s ‘The Search for Spock’, a year before he became a cinematic icon in ‘Back to the Future’. Meeting his doom in a pool of molten lava, poor old Kruge probably wishes he had a flux capacitor.