You better not come any closer.
1 seconds sound clip from the Radar Men from the Moon - Molten Terror (S1E2) movie soundboard.
You can hear this line at 00:05:12.229 in the Blu-ray version of the episode.
Quote context
[...]
- If it's like the gun you found on Earth, it'll be too heavy to carry, let alone fly with.
- That's right, but the tripod isn't important. I'll dismantle a gun from the tripod.
- I think I can handle a gun all right.
- Maybe you can, but it'll be quite a load.
- I better get a helmet and go with you. Hank and Joan can stay here and guard the ship.
- Okay, I may need some help with that.
- You better not come any closer.
- I'll fly on in and get the gun.
- I'll manage to lug it back this far myself.
- With the whole town chasing you?
- I don't think they can get around outside very well, but we'll find out.
[...]