This film is a false documentary about a fictional, top-secret Soviet Interkosmos space mission based in East Germany.
However, the last scene reveals Seagull and Falcon to be still alive, as they converse about other failed secret Soviet space missions, most of which resulted in the demise of the entire crew.
The Village Voice's Dennis Lim called Interkosmos a "a retro gust of Communist utopianism" stating that it "weaves together lovingly faked archival footage, charmingly undermotivated musical numbers, propagandistic maxims ("Capitalism is like a kindergarten of boneless children"), stop-motion animation (of a suitably crude GDR-era level), a Teutonic (and vaguely Herzogian) voiceover, and a superb garage-y Kraut-rock score (by Jim Becker and Colleen Burke).
"[1] Wired's Jason Silverman ranked Interkosmos alongside Automatons, Puzzlehead, and The Wild Blue Yonder as "Best Shoestring Sci-Fi of 2006" stating that "At times, Interkosmos' hip, deadpan style threatens to grow tiresome, but then Finn injects something unexpected to liven it up.
By the end, Interkosmos has coalesced into a colorful portrait of an imagined time where movies and space travel were happy, bubbly things.