- You're gonna need a cover story.
- Why do we need a cover story?
- For the getaway.

5 seconds sound clip from the Criss Cross (1949) movie soundboard.

You can hear this line at 00:59:14.903 in the DVD version of the movie.

Quote context

[...]

- Here. Take a drink, you deserve it.

- When I'm finished.

- In the Rubel ice factory holdup years ago, they knocked off an armored truck for $427950.

- But the cops caught 'em, every one. They're all dead now. Electric chair, everything.

- Yeah, I realize. But 400 grand...

- Where's Anna?

- She just stepped outside for a paper.

- You're gonna need a cover story.

- Why do we need a cover story?

- For the getaway.

- I told you, that's the ticklish part, the most intricate. That's where you'll need the oil truck.

- One of those big ones? What for?

- To stall at the proper time and block the bridge.

- Oh, jam the truck sideways, right across the road.

- Mmm-hmm.

- That'll give your people a bit of a head start for the getaway.

[...]