Dan's (Kevin McKidd) travels take him into an RV hanging off of a cliff just in time to try and save a mother and son. Katie's (Gretchen Egolf) sister (guest star Melinda McGraw) comes to visit and suspects Dan needs help. When he returns home, Dan frantically searches for Zack (Charles Henry Wyson) and realizes how big the conseqences can be when he accidentally leaves things in the past.

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