Guest Stars: Phyllis Logan (Squadron Leader Helen Knox), Anton Lesser (Lieutenant Charles Terrell), Paul J. Medford (Nick Shay), Jo Dow (Flight Lieutenant Jim Ratcliffe), Gerard Rooney (Sergeant Tuffley), Chris Fairbank (Wing Commander Friday), Laura Harling (Emily Tucker), Stuart McQuarrie (Flight Lieutenant Gerry Llewellyn), Valerie Gogan (Angela Llewellyn), James Vaughan (Squadron Leader Haynes), Ian Aspinall (Fighter Controller), Miriam Leake (Fighter Controller), Jim Pyke (Fighter Controller), Simon Slater (Edward Fleming), Anna Maclay (Sarah), William Hoyland (Station Commander), Diana Payan (Gran), Michael Vaughan (Inspector Boyd), Sean Fall (R.A.F. Sentry), Selina Griffiths (Civilian Doctor), David Albion (Sergeant Lynch), Kieron Forsyth (Private Grover), Nicola Buckingham (Echo)
Written By: Jed Mercurio
Directed By: Patrick Lau
Ep: 2
Chapter Two: The Fourth Dimension
Guest Stars: Phyllis Logan (Squadron Leader Helen Knox), Anton Lesser (Lieutenant Charles Terrell), Paul J. Medford (Nick Shay), Jo Dow (Flight Lieutenant Jim Ratcliffe), Gerard Rooney (Sergeant Tuffley), Chris Fairbank (Wing Commander Friday), Laura Harling (Emily Tucker), Diana Payan (Gran), Michael Vaughan (Inspector Boyd), Graham Bryan (S.A.C. Woodward), Luke Garrett (S.A.C. Burton), Tom Freeman (S.A.C. Miles), Mark Webb (R.A.F. Doctor), Bob Barrett (Flight Lieutenant Stewart)
Written By: Jed Mercurio
Directed By: Patrick Lau
Ep: 3
Chapter Three: Only the Dead
Guest Stars: Phyllis Logan (Squadron Leader Helen Knox), Anton Lesser (Lieutenant Charles Terrell), Sara Kestelman (Group Captain Susan Preston), Paul J. Medford (Nick Shay), Jo Dow (Flight Lieutenant Jim Ratcliffe), Gerard Rooney (Sergeant Tuffley), Chris Fairbank (Wing Commander Friday), Bob Barrett (Flight Lieutenant Stewart), Nicola Buckingham (Echo), Laura Harling (Emily Tucker), Brian Pettifer (Motorist), Jonathan Coy (Major Alex Friedkin), Zoe Telford (Nurse Louise Reynolds), Terence Harvey (General Ramsey), David Albion (Sergeant Lynch), Kieron Forsyth (Private Grover), Chris Matthews (Army Doctor), Sean Fall (R.A.F. Sentry), Luke Garrett (S.A.C. Burton)
Written By: Jed Mercurio
Directed By: Patrick Lau
Ep: 4
Chapter Four: The Fall of Man
Guest Stars: Phyllis Logan (Squadron Leader Helen Knox), Anton Lesser (Lieutenant Charles Terrell), Sara Kestelman (Group Captain Susan Preston), Paul J. Medford (Nick Shay), Jo Dow (Flight Lieutenant Jim Ratcliffe), John Shrapnel (Air Marshal Bentley), Laura Harling (Emily Tucker), Bob Barrett (Flight Lieutenant Stewart), Chris Fairbank (Wing Commander Friday), Gerard Rooney (Sergeant Tuffley), Nicola Grier (Detective Sergeant Holland), Hugh Ross (Dr. Vickers), Sheila Grier (Jenny Marchant), Barbara Horne (Doctor's Receptionist)
Written By: Jed Mercurio
Directed By: Richard Laxton
Ep: 5
Chapter Five: The Battle More Costly
Guest Stars: Phyllis Logan (Squadron Leader Helen Knox), Sara Kestelman (Group Captain Susan Preston), Paul J. Medford (Nick Shay), Jo Dow (Flight Lieutenant Jim Ratcliffe), John Shrapnel (Air Marshal Bentley), Bob Barrett (Flight Lieutenant Stewart), Gerard Rooney (Sergeant Tuffley), Nicola Grier (Detective Sergeant Holland), Hugh Ross (Dr. Vickers), Sheila Grier (Jenny Marchant)
Written By: Jed Mercurio
Directed By: Richard Laxton
Ep: 6
Chapter Six: The Shatterer of Worlds
Guest Stars: Phyllis Logan (Squadron Leader Helen Knox), Sara Kestelman (Group Captain Susan Preston), Paul J. Medford (Nick Shay), Jo Dow (Flight Lieutenant Jim Ratcliffe), John Shrapnel (Air Marshal Bentley), Bob Barrett (Flight Lieutenant Stewart), Nicola Grier (Detective Sergeant Holland), Laura Harling (Emily Tucker), Diana Payan (Gran)
