flash back

(noun) a transition (in literary or theatrical works or films) to an earlier event or scene that interrupts the normal chronological development of the story. Synonyms: flashback.

(noun) an unexpected but vivid recurrence of a past experience (especially a recurrence of the effects of an hallucinogenic drug taken much earlier). Synonyms: flashback.

(verb) return in time. Synonyms: cut back. Example: "The film cut back to an earlier event in the story."