Ex-gangster Tony Banks is called out of retirement by mob kingpin God to carry out a hit on fellow mobster "Blue Chips" Packard. When Banks demurs, God kidnaps his daughter Darlene on his luxury yacht.
Acting
Gleason's genuinely committed acid-trip sequence is unhinged cinema.
Costume
Carol Channing's technicolor nightmare wardrobe deserves its own exhibit.
Production
Preminger somehow convinced a yacht, prison, and Harry Nilsson to participate.

Director
Otto Preminger
Trivia, insights & behind the scenes
Preminger allegedly took LSD during production to 'understand the youth,' which explains everything and nothing.
Harry Nilsson wrote the entire score and appears as a tower guard; his song 'Cast and Crew' lists everyone including the gaffer.