The lobsters are on the move as colder weather approaches; Tim confronts an unruly deckhand; Grant hands over the controls of his boat; Keith gambles with old bait.

Witness the terrifying stories of people who've been attacked by animals; relive the blow-by-blow details of these encounters, discover what the victims did - or didn't - do to survive, and learn how to defend against, or avoid, these types of attacks.

While trying to survive after a viral apocalypse, a massive fire forces the colonists to rethink their internal security options and Reno comes up with a creative way to build a huge windmill out of scrap found in the compound.

The RAF's 202 Squadron is scrambled to airlift a possible heart attack victim to hospital, but winching him off a dive-support vessel at sea proves difficult; an anchor cranking crew shifts 13,000 tons of oil rig 300 nautical miles in mid-winter.

RATED 14+. A climber saves himself by dislodging a 500-pound rock; a mother summons up the strength to lift a car to free her trapped son; a firefighter throws off a huge beam to escape a burning building.