Mr. Warmth: The Don Rickles Project(2007)

Overview:

The documentary consists of tape of Don's show (never been filmed before), interviews with Don's contemporaries, (Steve Lawrence, Bob Newhart, Debbie Reynolds, etc.), established comedians (Billy Crystal, Rosanna Barr, Robin Williams, Chris Rock, etc.) and young comedians (Jeff Atoll, Jimmy Kimmel, Sarah Silverman, etc.).