Stingray - Season 1 Episode 27 The Disappearing Ships

Troy and Phones discover a strange city of sunken ships when they search for three disused freighters that were to be blown up by remote control. The Nomads, who live in the sunken ships, are unaware of the timed explosives in their new requisitions and refuse to believe Troy. That is until one of the vessels detonates. The explosion jams the escape hatch. The second ship explodes but it is the nearby third one that could kill them. With only 10 minutes to go, they desperately manage to free the hatch and escape.