Point of No Return (Stargate SG-1)

"Point of No Return" is an episode from Season 4 of the science fiction television series Stargate SG-1.

An eccentric man named Martin, portrayed by Willie Garson of Sex and the City fame, seems to know much of the Stargate program. When O'Neill questions him, Martin reveals his true identity as an alien soldier, deserting from an alien war. At first no one believes Martin, but after several attempts by his compatriots to quiet him he eventually remembers that his fellow deserters are also here on earth. In the end Martin agrees to relenquish his memories and live here, while his fellows destroy the ship and disappear.