Retrospective Voiceover
Having a narrator tell the story from some point after it happened. The events feel like memory, and you sense early on that something will be lost.
Radio Days
Joe, voiced by Allen, tells the story from years later. He recalls his family and the radio shows they loved. Because he is looking back, even the funny scenes carry a feeling that time has passed. It sets the film's gentle, wistful tone.
Catch Me If You Can
The film frames Frank's story as a look back. It starts with Hanratty arriving in France to collect Frank from prison, then jumps back to the teenager who ran. There is no narrator, and the framing does the job a voiceover would. That distance makes the cons feel wistful and keeps the film from condemning them. Telling it in hindsight lets you enjoy the adventure before you see the cost.

