Tonight's season finale is a double episode jam-packed with adrenaline, laughs and tears as the season ends on a personal note for the lifeguards.

A cyclonic swell hits Bondi Beach with 12 foot waves sucking beachgoers out to sea. It is Harries' most challenging rescue of the season as he and his patient are slammed repeatedly into the rocks.

The boys and girl in blue are convinced they have seen it all. But when a man waddles to the tower tonight with a horrendous dog bite on his manhood, the Bondi lifeguards cannot believe their eyes.

A dramatic fight breaks out when a man confronts a photographer taking pictures of his topless girlfriend. Meanwhile, Deano performs a mass rescue for a group not taking their situation seriously.

An inexperienced surfer is sucked into a vortex. Yatesy paddles into 10 foot swell for a rescue that doesn't go to plan, finding himself washed up on the rocks with his patient nowhere to be seen.

At the south end of the beach, a man screams in pain when he dislocates his hip. The lifeguards are taken by surprise when the man's friend then has a seizure just metres away, but not everything is as it seems.