Anthony Calf credited as playing...
Martin Keller
- Wing Commander Martin Keller: I was simply doing what I thought was best for the war!
- DCS Christopher Foyle: I'm sure a great many Nazi's will be saying the same thing when this war is over.
- DCS Christopher Foyle: I'm here to collect my son. Is he still here?
- Wing Commander Martin Keller: Yes, yes, he's still here... look, Mr. Foyle, I just want to tell you that, in spite of what you might think, I've done absolutely nothing wrong.
- DCS Christopher Foyle: Well, not exactly true.
- [Wing Commander Keller arrives at Group Captain Graham's house, and reveals that he will be investigating the Group Captain's death]
- DCS Christopher Foyle: You're too late. I know who killed him, and why he was killed.
- Wing Commander Martin Keller: [leaning close to Foyle] Tell me!
- DCS Christopher Foyle: Not until I've seen my son.