D

an flashes back to 1984 to save teenager Christopher Cupper and his eye-impaired would-be-painter ma Sandra from crashing with their camper into a ravine. Dan's worries about the possible effect of leaving behind a digital camera seem unwarranted, until he discovers his darling son Zac has been replaced by a girl, which his wife wants to keep instead anyhow. He has to deal with the Cuppers in both time zones, guessing Christopher's tech-nerd-friend Dewey Boyd is the key. Meanwhile brother Jack faces his upcoming fatherhood and leans heavily on his FBI contact until he traces a NASA physicist.

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