Woody Harrelson as Duncan Allcock

Simu Liu as David Yuasa

Finn Cole as Chris Lemons

Cliff Curtis as Andre Jenson (Captain)

Mark Bonnar as Craig (Dive Supervisor)

MyAnna Buring as Hanna (1st Officer)

Josef Altin as DPO

Bobby Rainsbury as Morag

Connor Reed as Andrew (Rov Pilot)

Nick Biadon as Stuart (B Team)

Riz Khan as Kirk (B Team)

Aldo Silvio as Brad (B Team)

Kevin Naudi as Alex (C Team)

Claudiu Baciu as Paul (C Team)

Brett Murray as Nick (C Team)

Muhammad Arnini Bin Ariffin as Jun

Yaroslav Musii as Sat Tank Technician #1

Ramon Camilleri as SAT Tank Technician #2

Christian Scicluna as Ships Officer

Daithí O'Donnell as Ian (uncredited)