Discovery Channel HD

'S3/E7'. A dark horse wins a key asset. A big kill could shift the power balance. A top contender's exit rocks the competition.

'S1/E7 - Held Hostage By A Humpback'. Experts explain footage of a humpback whale holding a diver hostage. Plus, how could a colony of 1.5 million animals hide from the world in plain sight?

'S2/E8 - Line Of Fire'. A homestead in danger of a raging California wildfire prompts Marty to clear cut surrounding trees and create an evacuation ark for the Grants' livestock.

'S2/E9 - Wisconsin Washout'. The homestead of musician Lou and partner Stacey is threatened by water erosion and at serious risk from a torrential rainstorm. The Raneys come to the rescue.

'S8/E1 - Rowed Trip Dirty Infrastructure'. Mike and his crew jump in an RV and set off on a road trip. Along the way they reminisce about working classic American infrastructure jobs.

'S8/E2 - Rowed Trip Tight Spaces'. Mike reflects on the jobs that had him wriggling into tight spaces. And, he checks in with hard-working people who work these jobs every day.

'S6/E10 - Ultimate Rescue Truck'. Jake Paul is after something much bigger and better than his brother Logan's Cool Bus. He wants a merch truck that doubles as the ultimate rescue mobile.

'S1/E17 - Launching A '69 Satellite Part 1'. The guys turn a '69 Plymouth Satellite into a racer with a 750-hp big block 440 engine. Thomas buys a '32 Ford five-window body from Richard.

'S2/E10 - High Country Bear Lair'. The Counters moved to a remote plot in Colorado for much-needed tranquillity. But two years in, their crops are failing, and their teenage kids are bored.

'S2/E11 - Life Or Death In Michigan'. The Dagues moved to Michigan's wilderness. But they have no power, predators killed their chickens and all their water must be hand-pumped from a well.

'S1/E8 - Crow Crime Scene'. Experts analyse and explain how spiders covered a whole town in webs overnight. Plus, do crows have funerals and why is a lake in Venezuela so electrifying?

Examine the hunting approaches of tiger sharks and great whites, namely the polaris breach, aerial breach and surface broach. What makes these killer strategies so effective?

'S1/E1'. Researchers brave a great white shark feeding frenzy inside a life-sized whale decoy - which could be the key to finding the biggest great white sharks in South African history.

In 2012, Michelle Jewell documented one of the largest great white mating scars ever recorded. Now there are signs that mega-shark El Diablo has returned to South Africa.

'S2/E7 - Robert & The Rattlesnakes'. Robert wrangles Western Diamondback rattlesnakes in Arizona for the first time using his dad's techniques. Terri helps save some baby feathertail gliders.

'S1/E7 - Baby-Faced Menace'. Bradley and Billy are in southern California to find a super predator, the sugar glider. These marsupials are the dominant predator for their size.

'S1/E8 - Hell Hamster'. The guys are in Mpumalanga, South Africa, searching for the Cape mole-rat. They have giant, razor-sharp teeth and is known as the 'king of the underground'.

'S7/E11 - Raney Returns: Quake And Break'. Marty races back to the Adams homestead in Alaska to fix quake damage and build a bear-proof shelter in hopes of keeping their homestead dream alive.

'S1/E7 - Fire And Water'. A busy firefighter and his wife living on a farm in Northern California need Anthony's help to fix the do-it-yourself pool project they started.

'S1/E8 - Laps Of Luxury'. A pair of fitness fiends wants a multipurpose pool they can use for exercise and entertaining friends, but is also a safe place for their four dogs.

'S1/E9 - Sporting Pool'. A family is putting renovations on hold to build the pool of their dreams. But with limited space and challenging weather, can Anthony find a way to please everyone?

'S2/E3 - Portugal: Mini Moke'. Mike and Elvis head to sun drenched Portugal where the iconic Mini Moke has earned cult status. It's a car with a very special place in Mike's heart.

'S1/E2 - 2016 Subaru BRZ'. The boys get their hands on a stock Subaru BRZ. That won't do, so Nads and Amir add some affordable mods to turn it into a respectable track car.

'S18/E6 - Audi RS 6'. Mike and Elvis have one of their toughest challenges yet: can they make an Audi RS6 estate car faster than a sportscar? Elvis has doubts after a hazardous test drive.

'S18/E7 - Ford P100'. Mike gambles on a Ford P100 imported from South Africa to Scotland. But it's hit with a series of problems - and will it cope with the UK's weather and roads?

'S2/E1 - Tased And Confused'. Police work can be risky business, especially when criminals are armed. That's why officers use non-lethal tactics like tasers and bean bag rounds.

'S2/E1 - DIY Disasters'. Many people between claim to be do-it-yourselfers, but from chainsaw mishaps to beehive blunders, sometimes it's best to leave it to the pros!

'Street Outlaws: No Prep Kings: The Great Eight. S2/E13 - Time To Multiply'. It's time for the first points multiplier race! With each win worth 1.5 times as much, racers are looking for every chance they can find to catch Kye.

'S4/E14 - Kayla Takes A Leap'. With only two events left, drivers are in Alabama, where captains gamble on big trades that stir controversy among the teams.