Telecrime

The series ran 2 seasons across 10 episodes and has finished, so there is no cliffhanger risk.

Telecrime was a British drama series that aired on the BBC Television Service from 1938 to 1939 and in 1946. One of the first multi-episode drama series ever made, it is also one of the first television dramas written especially for television not adapted from theatre or radio. Having first aired for 5 episodes from 1938 to 1939, Telecrime returned in 1946, following the resumption of television after World War II, and aired as Telecrimes. A whodunit crime drama, Telecrime showed the viewer enough evidence to solve the crime themselves. Most episodes were written by Mileson Horton. All 17 episodes are lost. Aired live, their preservation was not technically possible at the time.