3rd Rock from the Sun

The Big Giant Head Returns (5x12)

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William Shatner reprises his role as the Solomons' supreme leader, the Big Giant Head, who returns to Earth to claim his son. Even though he's startled at first that the 6-month-old doesn't resemble a warrior, Stone Phillips (the Big Giant Head's earthling name) quickly becomes a proud papa. He also falls head over heels for the infant's mom, Vicki, who has abandoned her trashy look. But she despises him and has no plans to give up his heir. This causes a frightened Dick (to find himself between a Stone and a hard place when ordered to either make Vicki love the leader--or die!