The Gun on Ice Planet Zero (1) - S1-E8
Plot hole: The borrowed (oh, all right, ripped off) plot of "The Guns of Navarone" does not translate well here. The premise, that the rag-tag fleet must pass through the "narrow corridor" guarded by the pulsar gun, is ludicrous. We're in outer space here. Outer space is very, very big. We can fly around one lousy little planet, no matter how many Cylons are "herding us" toward it.