The pot stacks keep turning into frozen mountains and days of ice bashing has the entire fleet fighting to stay in action. On the Northwestern, the exhausted crew struggles to keep up with Captain Sig's maniacal pace. The other boats face their own challenges from chronic pain to shell-shocked greenhorns.

WATCH FOR:

* One deckhand pays the price in blood.
* The Kodiak crew finds mathematics a challenge.
* The Cornelia Marie wheelhouse becomes a house of pain.
* Greenhorns can't find any sympathy.

Source: Discovery