When Sig's fishing information falls into the wrong hands, he deals his protégé a lesson he won't soon forget. After his crew gets slammed by back-to-back waves, Rick faces a gun-shy deckhand. Sophia contends with a crewman with a badly infected tooth.

A below-deck brawl puts Sophia "Bob" Nielsen's captaincy to the test on the Seabrooke. A hydro leak on the Summer Bay threatens to send Wild Bill's King Crab season into the red. Rick must make a crucial decision when Jacob's deckmate crosses the line.

After leaving Sig's boat, Jake has a lot to prove on the massive Titan Explorer. Sig and Johnathan jockey to get ahead of a migrating king crab hoard in an underwater canyon. Rick faces Keith's wrath when his captain-in-training launches a rogue set.

As competition heats up on the King Crab grounds, Jake's next move puts him at odds with Capt. Sig. Wild Bill battles heavy seas and side effects, while Sophia "Bob" Nielsen attempts to pop in a deckhand's dislocated hip to avoid a steam back to town.

In the Season 20 premiere, King Crab's return ignites a derby-style race. After losing the Saga, Jake joins Sig as co-captain. A serious hip injury tests Sophia. A fire on the Wizard traps Keith's deckhand below deck. Wild Bill faces his hardest test yet.