There are plenty of guilty secrets at the school where Hildegarde Withers teaches. When she finds the body of the pretty music teacher, she calls in her old friend Inspector Piper, who promptly arrests the obvious suspect. Clues multiply and everyone looks suspicious as Piper and Miss Withers continue their battle of the sexes.
There are no TV Airings of Murder on the Blackboard in the next 14 days.
Add Murder on the Blackboard to your Watchlist to find out when it's coming back.
Check if it is available to stream online via "Where to Watch".