Garcia Flynn has stolen an experimental time machine and has taken it to May 6, 1937 to change the fate of the Hindenburg, for the worse. It's up to historian Lucy Preston, scientist/pilot Rufus Carlin and soldier Wyatt Logan to stop him.
- Dramatic Irony: In their attempt to save the Hidenburg, they end up destroying it.
- Retgone: What happens to Lucy's sister after she returns.
- Ripple-Proof Memory: Becomes a plot point.