Mirror Images - New page in the Imaging Chamber

Awesome! Of course, the one and only that we've never actually seen was Sam Bederman of "Shock Theatre." ;)

EDIT: Also, that random firefighter in "Honeymoon Express."

Exactly, and also a leap we never saw on screen but was talked about at the end of The Leap Back - a stand up comic (not the one from the episode "Stand Up")