'Deadliest Catch' Finale Sneak Peek! Watch This Deckhand's Crazy Marriage Proposal

"Extra" has an exclusive sneak peek of the upcoming season finale of Discovery's "Deadliest Catch."

In the clip, Cornelia Marie deckhand Jason “Tennessee" King makes a crazy marriage proposal to his girlfriend while on a fishing expedition. Check it out!

Watch the two-hour season finale on Tuesday, August 18 at 9 PM on Discovery.