Good Television Mystery Series

[Dannyalcatraz]

Only Murders in the Building does good season-long mysteries.

Poker Face does a nice twist on the standard mystery procedurals.

I’ve heard good things about both, but haven’t watched either.

 

[Kobold Stew]

If you have access to UK series, I have enjoyed and re-watched

Foyle's War (WW2 detective, on the home front in England)

If you're open to more police-based things, for different reasons all of these are worth a try:

Life on Mars and Ashes to Ashes (police detective goes back to the 1970s, doesn't know how or why, but he's a cop!; then 1980s).
Line of Duty (internal affairs investigates a supercop in season 1; things proceed from there; really only one weak arc)
Slow Horses (current series, on Apple; with Gary Oldman... lots of Le Carre vibes)

 

[James Gasik]

True Detective (forget season 2, the others are good)
Pushing Daisies (very quirky)
City Homocide (Australian procedural)

If you're willing to go to Old Time Radio, you should definitely check out Your's Truly, Johnny Dollar. Specifically, the Bob Bailey era from 1955 to 1960. Each case is 5 20-minute episodes (originally airing Mon-Fri). Absolute perfection of the radio drama.

If you like Sherlock Holmes in any format, I also recommend looking up Nero Wolfe. I'm partial to The New Adventures of Nero Wolfe radio show, from 1950-1951.

Oh and A Nero Wolfe Mystery is also excellent- Maury Chaykin's take on the character contrasts quite well with Sydney Greenstreet's.

 

[Dannyalcatraz]

Life on Mars and Ashes to Ashes (police detective goes back to the 1970s, doesn't know how or why, but he's a cop!; then 1980s).

Those were GREAT!

 

[overgeeked]

True Detective, season 1 is fantastic and brutally dark.

Broadchurch, UK version with Coleman, Whittaker, and Tennant.

Presumed Innocent.

How to Get Away with Murder.

Castle, for a bit more comedy, it has a few real mystery writers show up later on.

Bodies, for some sci-fi mystery.

Fargo, the TV series.

The Staircase.

Poker Face.

Veronica Mars, for a bit of lighter mystery plus teen angst.

Twin Peaks, I mean come on you must have watched that by now.

Lie to Me, a slightly different take on the mystery genre with a human lie detector. Based on real science but wildly exaggerated for TV.

Luther, Idris Elba.

 

[Dannyalcatraz]

@overgeeked

I’ve seen several of those, but not all…and Twin Peaks is on the not list.

I think I’ve seen all of 3 episodes, nonsequentially.

 

[Morrus]

Only Murders in the Building does good season-long mysteries.

Poker Face does a nice twist on the standard mystery procedurals.

Poker Face is excellent. Like Columbo, it's not a whodunnit, more a how/whydunnit.

For UK series (keeping to relatively modern/ current ones, otherwise the list would be endless) we've really gotten a lot out of Unforgotten, Broadchurch, and Vigil (a police detective sent to solve a murder on an active nuclear submarine!).

A lot of people watch Death in Paradise, but I've never seen it. Sherlock is an obvious one, but I figure you know about that. Line of Duty is less murder mystery and more corrupt cop investigation.

 

[Paul Farquhar]

I really like Astrid: Murder in Paris (French). it's on Channel 4 in the UK.

 

[Tonguez]

last one I enjoyed was Miss Fishers Murder Mysteries, set in 1920s Melbourne, Australia. its a decade old now...

 

[MarkB]

If you don't mind anime and a quasi-historical setting, The Apothecary Diaries is good.