Not guest star related but - was recently watching the 1967 MANNIX episode "The Many Deaths of St. Christopher" and saying to myself, "This episode's musical score reminds me very strongly of STAR TREK's "The Empath". Then the credits roll and it says "Music by George Duning". Well, knock me over with a feather.
What, you didn't read that 300 posts ago?

http://www.trekbbs.com/threads/trek...surprising-roles.205921/page-54#post-11326970
I said "Metamorphosis," though.