Trying to help my grandparents find a new detective show to watch. For reference, here's what they've already watched:
Bosch
Bosch: Legacy
Beyond Paradise
Death in Paradise
Elementary
Endeavour
Father Brown
Lewis
Lie to Me
Longmire
Marple
Midsomer Murders
Murdoch Mysteries
NCIS
Poirot
Shetland
The Brokenwood Mysteries
The Mentalist
While they generally seem to prefer British detective shows, I'm not sure which ones are left to recommend to them.
Criminal Minds