1x05: Blue on Blue
1x04: Outbreak
1x03: Manhunt
1x02: The Fire
1x01: Pilot
5x04: The Greater Good
5x03: Pie and Prejudice
5x02: Sticks and Ropes
5x01: The Trinity
4x08: The War Child
4x07: Making History
4x06: Puppy Love
4x04: A Spectre Calls
4x02: Being Human 1955
4x01: Eve of the War
3x06: Daddy Ghoul
