There are four actors in this episode ("And Make Thunder His Tribute") of Route 66 who later played characters in Star Trek (TOS). Glenn Corbett played Zefram Cochrane in "Metamorphosis." Alfred Ryder played Prof. Robert Crater "The Man Trap." Lou Antonio played Lokai in "Let That Be Your Last Battlefield." And Michael J. Pollard played Jahn in "Miri."
Michael J. Pollard (Vinny). Jahn. Miri.