'A Walk in The Dark' a five-part police drama by Chris Boucher from 1981, is currently available to UK listeners for free at BBC Sounds.
Nicolas Courtney turns up in episode one; Peter Tuddenham takes on a role for episode 3 and Gregory de Polnay appears in episodes 4 & 5.
It's like a pre-Kaldor City team-up!
There are also some lines (or variations on such) that Boucher employed for his Doctor Who and Blake’s 7 scripts.
“You must think my head zips up the back!”
Said Colby to Fendelman during Part Two of 'Image of the Fendahl'.
This was asked of D84 by the Doctor in Part Three of 'The Robots of Death.'
“For a policeman, you lie badly.”
Kerril tells Vila “For a thief, you lie badly”, during 'City at the Edge of the World'.
“I suppose paranoia is an occupational hazard in your profession?”
This is a variant of Avon’s statement to Shrinker “Paranoia is the occupational hazard of the torturer,” from 'Rumours of Death'.
“Perhaps you'd give me your professional opinion as to what this is?”
Is a version of Avon’s line to Dayna “I want your professional opinion of that”, during 'Rescue'.
As for the play itself?
It's well cast, nicely produced and the writing is good!