Synopsis by Hal Erickson
Oscar-winning dramatic actress Mercedes McCambridge lets down her hair in the raucously comic role of Sybilla, the matriarch of a family of outer-space hillbillies (their spacecraft looks like the Clampett family's tarpaper shack!) Hoping to be taken back to earth, Dr. Smith (Jonathan Harris) romances Sybilla, while Don (Mark Goddard) develops a more sincere interest in Sybilla's toothsome daughter Effra (Sherry Jackson). What nobody realizes until it is almost too late is that the hillbillies are raising a crop of extremely carnivorous plants! This episode reunites guest star Sherry Jackson with series regular Angela Cartwright; the two girls had respectively appeared as Terry Williams and Linda Williams on The Danny Thomas Show.