1x01: Episode 1
5x01: The Trinity
5x02: Sticks and Ropes
5x03: Pie and Prejudice
5x04: The Greater Good
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
3x05: The Longest Day
3x04: The Pack
3x03: Type 4
3x02: Adam's Family
