Flashback may refer to:

• "Flashback", the Voyager episode
• Flashback (novel), the novelization of the Voyager episode
• Flashback (story device), the device of telling about back story
• Flashback, in which a person is (usually unexpectedly) revisited by elements of an experience

For the medical phenomena:

• Hypnagogic regression, the medical condition causing "flashbacks" to be experienced

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