Twiki is kidnapped by the evil ruler of a mining colony who, faced with an uprising of the mine workers, plans to make duplicates of the mechanoid to work the mines. While in the mines attempting to rescue Twiki, Buck discovers something that will help Earth destroy a 10-ton ice asteroid that is on a collision course with Earth.
Elenco: Gil Gerard , Erin Gray , Mel Blanc , William Conrad , Eric Server , Wilfrid Hyde-White , Thom Christopher , Pamela Hensley .