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This episode introduces Julie McCullough in the role of Julie Costello, the 19-year-old nanny hired to take care of little Chrissy Seaver now that mom Maggie (Joanna Kerns) has returned to work. It was Mike (Kirk Cameron) who selected Maggie, not so much for her child-care skills as for the fact that she is drop-dead gorgeous. It isn't long before the ultra-efficient Julie bids fair to completely take Maggie's place around the house--and just guess what Maggie has to say about that!