10 Star Trek Characters Who Have Appeared In The Most Shows

10. Miles O'Brien - 3

Star Trek: The Next Generation
Star Trek: Deep Space Nine
Star Trek: Lower Decks

We kick off the list with perennial fan favourite and long suffering everyman Chief Miles Edward O'Brien.

Introduced to fans in a supporting role onboard the Enterprise in The Next Generation, standing patiently at the transporter console awaiting instructions, O'Brien proved to be a favourite among both fans and writers, largely thanks to a wonderfully understated performance by Colm Meaney.

O'Brien would go on to marry Keiko Ishikawa and have a daughter, Molly, before being posted to DS9 to serve as Chief of Operations/Chief Engineer throughout the show's seven years. Now promoted to the opening credits, O'Brien served as the empathetic working man amongst the fantastical officers, and would routinely go through a traditional 'O'Brien must suffer' episode each season as writers put him through the ringer of emotional traumas.

Although this would be the last in-person appearance of the Irish Chief, he would get his name check as ‘the most important man in the history of Starfleet, complete with a golden hologram of him at his transporter console, in Lower Decks. As far as the Star Trek fandom, whose Facebook group ‘The Same Photo of Chief O’Brien Everyday’ has amassed half a million likes, this assessment is bang on the mark.