Frank Conniff

Frank Conniff (born August 30 1958) is a writer and actor who is perhaps best known for his portrayal of TV's Frank on Mystery Science Theater 3000 (MST3K). From the second through sixth seasons of the show's time on Comedy Central, Conniff played one of the "mads" (short for "mad scientists") next to Trace Beaulieu. During his years with MST3K, Conniff was also part of the writing team, and the individual responsible for screening and selecting many of the films shown. After leaving MST3K behind, Frank went on to become executive story editor for the popular ABC series Sabrina, the Teenage Witch. He made a few on-air appearances on the show, most notably as "Rootie Kazootie", a baby-turned-adult due to Sabrina's wishing spell. He later showed up as a writer and later as head writer on the ill-fated Nickelodeon TV series Invader Zim, even making a few cameo appearances before departing from that show as well, marking the second TV show that he has been associated with that was... full article at wikipedia