10 Cosy Mystery Picks for Rainy UK Nights (Films + Series)

Cosy mysteries are the perfect antidote to a grey UK evening. The stakes are real, but the tone stays warm: clever clues, charming ensembles, and just enough tension to keep you leaning in without draining your energy. If you want whodunits that feel like a blanket and a hot drink, start here.

Below are ten evergreen picks — a mix of films and series — with quick hooks and a reason each one lands so well when you’re in the mood for comfort with a twist.

1) Knives Out

An ensemble whodunit that plays fair with its clues while keeping the banter sharp. It’s cosy without being soft, and the character dynamics are half the fun.

Hook: A modern drawing-room mystery with bite. Start here via Knives Out.

2) Glass Onion: A Knives Out Mystery

Bright, playful, and built for a group watch. It’s the kind of mystery where the surface glitter hides a smarter core.

Hook: Sunlit chaos, razor-sharp reversals.

3) Gosford Park

If you like your mysteries wrapped in period detail and quiet tension, this is peak cosy. The class dynamics are the puzzle as much as the crime.

Hook: A stately-house mystery where every glance means something.

4) Clue

Go in for the pure comfort. It’s fast, funny, and perfectly rewatchable, with a cast that turns every line into a punchline.

Hook: A whodunit that feels like a game night you’re invited to.

5) See How They Run

Meta, mischievous, and full of character. It’s a backstage mystery with a playful tone and a satisfying detective duo.

Hook: Theatre chaos meets classic whodunit rhythms.

6) Enola Holmes

Lighter on grit, stronger on charm. It’s a mystery that leans into curiosity and cleverness, with a breezy, adventurous pace.

Hook: Sleuthing with a spirited, modern tilt.

7) Only Murders in the Building (Series)

Cosy crime for people who like character comedy alongside their clues. Each episode drips with building-specific detail and neighbourly chaos.

Hook: A murder mystery that feels like a warm, witty hangout.

8) Miss Fisher’s Murder Mysteries (Series)

Glamour, wit, and a detective who knows exactly who she is. It’s stylish, light on the gore, and heavy on character flair.

Hook: A detective series that feels like a vintage cocktail.

9) Poirot (Series)

Classic storytelling with a steady, comfortable cadence. Perfect when you want clean plotting and satisfying reveals.

Hook: The gold-standard comfort watch for mystery purists.

10) Midsomer Murders (Series)

Quaint villages, gentle pacing, and a steady rhythm of clues. It’s long-running comfort TV with a mystery heartbeat.

Hook: A countryside mystery that’s cosy even when it’s sinister.

How to pick your cosy mystery tonight

• For modern charm: Start with the Knives Out films.
• For classic comfort: Choose Poirot or Midsomer Murders.
• For a lighter lift: Go with Clue or Enola Holmes.

If you want something darker after this list, try this guide to slow-burn crime dramas worth the build-up.

Availability shifts across UK services, so the fastest route is to use each title’s watch page to compare options before you commit to a night in. If you want a reliable all-rounder for cosy mysteries, Prime Video is a strong starting point.

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Final takeaway

Cosy mysteries are about mood as much as plot. Pick the flavour you’re craving — modern banter, classic detective rhythms, or gentle ensemble chaos — and you’ll have a rainy-night watchlist that feels as comforting as it is clever.