I stumbled across this podcast while searching for something to listen to while doing some mundane grading. It turned out to be an extremely interesting interview.
Gilbert Godfrey is himself, but is overshadowed in the discussion he has with Billy Mumy, where he discusses his experiences with directors, fellow actors and some interesting anecdotes throughout his career, from the Twilight Zones and Lost in Space to Babylon 5 and more.
I might try a few more of the interviews (this was #41), but it'd be hard to top, at least in my estimation.
Here's the link if you're interested: Gilbert Gottfried's Amazing Colossal Podcast #41: Bill Mumy