The Third Man (S05E01)

Title: The Third Man Plot: A devastating suicide bombing at a nightclub sends shockwaves through the crew of HMAS Hammersley. Dutchy goes undercover alongside the SAS to track down a dangerous faction of extremists planning further attacks on Australian soil. Meanwhile, 2Dads puts his life on the line to thwart a bomb threat against the Hammersley. Kate's life takes a turn when her ex, SAS officer Jim Roth, reappears on board. Additionally, Mike jeopardizes his career by standing firm against directives from a senior ASIO operative.