Ian Stenlake Lt Cmdr `CO' Mike Flynn Actor Lisa McCune Lt `XO' Kate McGregor Actor Saskia Burmeister Lt Nikki `Nav' Caetano Actor John Batchelor Cheif Engineer Andy `Charge' Thorpe Actor Jeremy Lindsay Taylor Petty Officer Pete `Buffer' Tomashevski Actor Matthew Holmes Chief Petty Officer Chris `Swain' Blake Actor Jay Ryan Able Seaman Billy `Spider' Webb Actor Kristian Schmid Radio Operator Robert J `RO' Dixon Actor David Lyons Leading Seaman Josh `ET' Holiday Actor Steve Bisley Cmdr Steve Marshall Actor Chris Martin-Jones Director Geoff Bennett Director Sarah Smith Writer Jeff Truman Writer Hal McElroy Executive Producer Di McElroy Executive Producer