Battlestar Galactica S01 E06 The Gun on Ice Planet Zero (1)

"The Last Battlestar Galactica Leads a Rag Tag Fugitive Fleet on a Lonely Quest for a Shining Planet Known as...Earth."

Baltar attempts to lure Galactica into range of a gigantic pulsar cannon. Adama becomes aware of the trap and sends in a team of commandos to destroy it.