Helvetesgänget was released in the year 1968。Helvetesgänget is also called as Psych-Out, Revolt of the Flower People, Pasaporte a la locura, Kuumaa 60-lukua, Busca Alucinada。

Jennie (Susan Strasberg), a deaf runaway who has just arrived in San Francisco's Haight-Ashbury district to find her long-lost brother, a mysterious bearded sculptor known around town as The Seeker (Bruce Dern). She falls in with a psychedelic band, Mumblin' Jim, whose members include Stony (a pony-tailed Jack Nicholson), Ben (Adam Roarke), and Elwood (Max Julien). They hide her from the fuzz in their crash pad, a Victorian house crowded with love beads and necking couples. Mumblin' Jim's truth-seeking friend Dave (Dean Stockwell) considers the band's pursuit of success "playing games," but he agrees to help Jennie anyway.

Helvetesgänget actors and actresses include Bruce Dern, Dean Stockwell, Garry Marshall, Henry Jaglom, Jack Nicholson, Susan Strasberg。