Related Clues:

• Story surprise
• Novel surprise ... and a hint to what's hidden in 17-, 21-, 36- and 49-Across
• Unexpected turn, and a feature of 17-, 21-, 36- and 55-Across
• Story surprise (letters 5-9 + ...)
• Story line surprise
• Familiar soap opera device
• It was all a dream, maybe
• Surprise in a novel