It's the ultimate in muscle-power and mega-danger as Mega Movers dive into the abyss to raise sunken submarines, braving deadly radiation and nuclear warheads. Witness the untold story behind the recovery and move of the doomed Russian sub Kursk. Remarkable feats of engineering are put to the test with the epic struggle to raise the Civil War sub, the H.L. Hunley - the first submarine to sink a ship in battle. In another first, Mega Movers pull off something that's never been done - rescue survivors trapped inside a submarine 243 feet down on the seabed and then recover the sub itself. Finally, the remarkable story of moving one of history's most famous subs - the HMS Holland One... it never saw battle but single-handedly changed the course of both world wars.