Dallas
The character Bobby Ewing is killed off in an episode as he is run down by a car as he was trying to save his wife Pamela Ewing in the 84-85 season. Actor Patrick Duffy moves on to other interests but things don't go well and Duffy decides to return the TV series next year. To bring him back the script writers decided to make the entire 85-86 a dream in Pams head in the 85-86 season finale
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