The SAS faces a new mission and potential disbandment, but an ally with a familiar name emerges.

Cast: Jack O'Connell, Connor Swindells, Gwilym Lee, Theo Barklem-Biggs, Jack Barton, Stuart Campbell, Jacob Ifan, Jacob McCarthy, Mark Rowley, Bobby Schofield, Sofia Boutella, Dominic West, Morgan Bailey, James Ó'Quinn, Edward Bennett, Paolo De Vita, Jane Fowler, Ivan Mlakar