Mr. Saturday Night

If knowing Stigwood’s name unlocks a particular chapter of film and music history, then the documentary is a fun and often funny reminder that they’ve frequently been one and the same.

Told in solid, straightforward, traditional documentary style and relying heavily on voice-over interviews from unspecified time periods, old TV clips, behind-the-scenes footage and period-piece still photos, Mr. Saturday Night tracks the Australian-born Stigwood’s trailblazing career in its entirety — but a great deal of focus is on the fascinating tale of how Saturday Night Fever came to be.

The movie gives pretty good showbiz lore but not much depth.

Maggio ends his story in the early 1980s, even though Stigwood lived until 2016. He is thinking small about a man who used to dream big.