A small, crab-like robot heralds the arrival of a family of colonists from an alien race called the Taurons. John believes that they are peaceful settlers, but Smith insists that they are the vanguard of an invading army.
Stars: Guy Williams, June Lockhart, Mark Goddard
Director(s): Sobey Martin
Writer(s): Herman Groves, Barney Slater, Irwin Allen