Sea Patrol - Season 5 - Eps 8: Lifeline
Robert becomes the lifeline when 2Dads is trapped alone in a sunken research submarine. Mike and the crew pursue a marine biologist suspected of sabotaging the submarine, and with 2Dad's air supply running out, Charge must use all his technical skills to help save his mate's life.
About Sea Patrol

Title: Sea Patrol
First Air Date: 2007-07-05
Last Air Date: 2011-07-12
Status: Ended
Rating: 6.95/10 (from 20 votes)
Language: EN
Seasons: 5
Total Episodes: 68
Network: Nine Network
Genres: Action & Adventure, Drama
Production Companies: Nine Film & TV Pty
Synopsis
Sea Patrol is an Australian television drama set on board HMAS Hammersley, a fictional patrol boat of the Royal Australian Navy. The series focuses on the ship and the lives of its crew members.
Cast

John Batchelor
Andy 'Charge' Thorpe

Conrad Coleby
Dylan 'Dutchy' Mulholland

Dominic Deutscher
Ryan White

Matthew Holmes
Chris 'Swain' Blake

Danielle Horvat
Jessica 'Gap Girl' Bird

Lisa McCune
Kate 'XO' McGregor

Nikolai Nikolaeff
Leo '2 Dads' Kosov-Meyer

Kristian Schmid
Robert 'Ro' J. Dixon

Ian Stenlake
Mike 'CO' Flynn