The SAS return to Britain and are given some time to decompress from the events in Italy. Bill is shocked to hear about the intended role for the SAS in the invasion of France.

Cast: Jack O'Connell, Connor Swindells, Gwilym Lee, Theo Barklem-Biggs, Jack Barton, Stuart Campbell, Dónal Finn, Jacob Ifan, Jacob McCarthy, Con O'Neill, Mark Rowley, Bobby Schofield, Corin Silva, Sofia Boutella, Dominic West, Edward Bennett, Nigel Boyle, Kelvin Ade