The Black Museum. Episode 18, The Gas Receipt. One out of two English blokes killed a policeman bloke and an inspector bloke has a hard time finding out which one of the two did the killing.
X Minus One. Episode 78. The Reluctant Heroes. After three years, an important lunar worker is looking forward to leaving for Earth, but he is badly needed on the moon and some head honcho types will try anything to keep him there for an additional 18 months.