You know, it's my guess that Don caught an early train and...

2 seconds sound clip from the The Lost Weekend (1945) movie soundboard.

You can hear this line at 00:45:30.777 in the Blu-ray version of the movie.

Quote context

[...]

- Don't ever tell him I said that though, will you?

- Of course not.

- I can never understand why somebody like Don, a person with such talent, such flashes of real brilliance...

- Maybe I'm a bit prejudiced.

- What are you doing, Wick?

- Nothing.

- Where did that bottle come from?

- It just rolled out.

- From under the couch?

- Yes, Helen.

- You know, it's my guess that Don caught an early train and...

- Is that Don's bottle?

- What makes you think that?

- There was a bottle the first time we met.

- There was?

- Fell out of Don's pocket.

- That was for me, Helen. This one's mine too.

- You might as well hear the family scandal. I drink.

- Don thinks I drink too much. I had to promise to go on the wagon. That's why I hid the bottle so he wouldn't see it.

[...]