The Sinister Speck The Speck uses a formula to shrink himself in order to photograph top secret plans. Details Casts Videos Galleries Posters Season Lists Title The Sinister Speck Genres Animation Comedy Release Date 1966-10-01 Episode Runtime 00 Hours 00 Minutes Season Number 1 Episode Number 12 Production Companies Unknown John Stephenson... ... Don Messick... ... Paul Frees... ... Ted Cassidy... ... Hal Smith... ... Dick Beals... ... Frankenstein Jr. and the Impossibles (Opening) (Opening Credits) Frankenstein Jr and the Impossibles (Opening Credits) Original Size (2000x1124) Original Size (1280x720) Original Size (1280x720) Original Size (1007x1416) Original Size (500x750) Original Size (500x750) Original Size (500x750) Original Size (680x1000) Original Size (680x1000) Original Size (680x1000) Season 1 54 Episode(s) 1966-09-10