John Cazale only made five films - but all classics. The Godfather, The Godfather II, The Conversation, Dog Day Afternoon, The Deer Hunter. A superb actor, he died early and has largely been forgotten.
However this touching and incisive tribute goes some way to addressing that. Showing footage from his films interspersed with talking heads of film critics, colleagues (Coppola, Pacino), former fiancée (Meryl Streep, who is gracious in her praise), this profile is excellent, highlighting his theatre career and his influence on those who worked with him or saw his performances.
There is little doubt that Cazale had the makings of greatness, despite being unconventionally good-looking. He's always been an actor I've noticed, particularly as Fredo in The Godfather and Sal in Dog Day Afternoon. This film hints at what could have been had he lived.
A short but sweet documentary, 'I Knew It Was You' is well worth a look if you are a fan of classic cinema, whether you're aware of Cazale's work or not.