Robert Downey Sr. was a great asset to American filmmaking. An experimental creative in New York, he made countless movies with his wife and family and didn’t care (as everyone does now) whether it made money or not—only that it made him and the people around him laugh and think and scratch their heads in equal measure.

Sr. is a documentary about this prolific man, as told by his son Robert Downey Jr.

In Sr., we get an intimate look at father and son—their home life, their sometimes-testy relationship, and their different artistic philosophies. It could have delved more into that conflict for some genuinely compelling scenes, but as it is, Sr. stands as an emotionally earnest ode to one of America's most visionary filmmakers. The love is palpable, and at least as a tribute, that's really all that matters.