To both commemorate the 50th anniversary of Star Trek (as well as drum up some excitement leading to the debut of its own Dirk Gently’s Holistic Detective Agency), BBC America will air a marathon of uncut, digitally remastered HD episodes from the space saga’s original series.

Starting Thursday, Sept. 8 at 8:30/7:30c — exactly 50 years from Star Trek’s original premiere on NBC — BBCA will present all Season 1 and 2 episodes, airing through Sunday, Sept. 11. That run will thus include Matt Mitovich favorites such as “The Enemy Within,” “Arena,” “Space Seed” and “The City on the Edge of Forever, as well as “Mirror, Mirror,” “The Trouble With Tribbles” and “A Piece of the Action.”

BBC America also releases a new teaser for the aforementioned Dirk Gently’s Holistic Detective Agency, which stars Elijah Wood and Samuel Barnett and premieres Saturday, Oct. 22 at 9 pm: