The Parent 'Hood

The Paw That Rocks the Cradle (1x6)

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Robert hopes a stray mutt will replace Nicholas' imaginary friend -- if they can keep the pup hidden from pooch-hater Jerri. The school psychologist convinces Robert than an imaginary friend is completely normal -- but when he relievedly tells Jerri about the dog, Jerri and the psychologist are convinced he's the delusional one.