I was looking at the recently-revived Episode Suggestions thread and decided that a bonus features thread was in order.
Here are a few ideas:
903-The Pumaman-Interviews with Walter George Alton and (if possible) the guy that played Vadinho.
1007-Track of the Moon Beast-Interview with Johnny Longbone (and maybe some clarification if Vadinho is an <sigh> onion...)
817-Horror of Party Beach-maybe a documentary concerning creature effects in some MSTied movies
205-Rocket Attack U.S.A.-maybe a documentary on propaganda films from the 50s and 60s
420-The Human Duplicators-interview with Richard Kiel (please oh please...)
323-Castle of Fu Manchu-interview with Christopher Lee (I know that's not likely, but...)
405-Being from Another Planet-I know this ep will probably not come out anytime soon, but maybe an interview with Ben Murphy
814-Riding with Death-if not for 405, maybe a Ben Murphy interview for this ep
111-Moon Zero Two-interviews with James Olson and Catherine von Schell
523-Village of the Giants-interviews with Joy Harmon, Beau Bridges and Tommy Kirk
601-Girls Town or 112-Untamed Youth-interview with Mamie van Doren (she was a former host of at least one MST marathon, after all)
702-The Brute Man-documentary on Rondo Hatton
909-Gorgo-maybe an interview with special effects team members | 
