I just watched this episode again and I have a question. Something that I hadn't thought about in the past. When they brought sir Roger's body back to his house the night of the murder, how did they get in and out of there without being seen by Tanner? I mean he certainly would have noticed two separate cars driving into the main house Late at night. Unless he was a very sound sleeper. Just something I thought I would throw out there for clarification purposes
I think Tanner mentioned something about moving into the Main House after the death, per Chief Inspector Dirk's request. Previous to that he was in the Guest House, which, I suppose, would have meant he would not have seen the cars???