- Open that door.
- I can't. He's holding it from the other side.
- Here, let me try.

6 seconds sound clip from the The 39 Steps (1937) classic radio play.

You can hear this line at 00:17:12 in the radio play.

Quote context

[...]

- Well, you didn't expect me to harbour a murderer, did you?

- Unfortunately, I did. And I am not a murderer.

- We'll see about that.

- Come on, Hannay.

- Certainly, gentlemen. I'll go with you willingly. In fact, I'll lead the way!

- Grab him! He's gone! Here, get after him!

- Open that door.

- I can't. He's holding it from the other side.

- Here, let me try.

- Together now. One! Two! Three!

- Get out of the way! Where is he? Where did he go?

- There he is! Down that passageway! Stop him! Grab him before he gets to the vestibule!

- Come back here, you! Come back, you! Stop! Stop!

[...]