The BBC hit series Torchwood is a spin-off of a spin-off, really: an extension of the new Doctor Who series that is itself only vaguely related to the classic long-running original. Torchwood's creators were apparently inspired by the still-underappreciated Buffy the Vampire Slayer, a show that used elements of fantasy as illustrations of (and counterpoints to) the characters' lives, and on the surface, the shows have a lot in common: Doctor Who attracted fans as much for its winking humor as its geeky sci-fi, and on Buffy, the satire was built in.
Torchwood has also followed in Buffy's footsteps in another way: towards the end of the latter show's run, two of the female characters fell in love, and their relationship evolved into the most fully-realized same-sex couple on television at the time. In Torchwood, a secretive X-Files-type agency is led by a mysterious (and apparently immortal) guy named Captain Jack Harkness, and he's typically courageous and handsome. He also appears to be gay, or at least bi: his romantic entanglements are with men, whether it's the cute office guy or the interstellar co-conspirator.