Elementary, My Dear Watson,...

[demographic]

Radio series but its excellent.
McLevy.

Well, I think there's about 11 series of it.

 

[Keith_Beef]

Broadchurch.
Dirk Gently's Holistic Detective Agency.
Number One Ladies' Detective Agency.

 

[TeeDee]

Oof, spoiler alert

Think I have it.. its an oldie

Murder by Death - Wikipedia

en.wikipedia.org

 

[Ozmundo]

I like Montalbano TV series starting Luca Zingaretti and the UK one with Rufus Sewell. Not totally sold on the young Montalbano.

Gotham by Gaslight, which is Batman vs Jack the Ripper. The Novel and the animated version are different stories however.

And for no reason:

 

[Lean'n'mean]

Oh all right then, here goes,

Jessica Fletcher.

There, it's done.

 

[William_Montgomery]

It's been a while since I read the stories, but Poe's Dupin deserves a mention.

 

[Ozmundo]

Oh all right then, here goes,

Jessica Fletcher.

There, it's done.

To be honest she is the best.

 

[Mesquite]

Frost
Begerac (original series)
Columbo
Jim Rockford
Banacek

A couple other great detectives set in the middle ages.

Brother Cadfael
William of Baskerville (Name of the Rose)

​

 

[gibson 175]

Cagney and Lacey
Miss Marple

 

[Broch]

You're all too serious!

Death in Paradise and, if that's not cringeworthy enough, Shakespeare and Hathaway

 

[Nice65]

The Residence was alright if you like the Knives Out style.