Everything you need to know about 'True Detective: Night Country'

Are you watching True Detective: Night Country and have a lot of questions? You're in good, obsessive company if you're scanning for clues like we are.

In the depths of this cold, cold winter, Mashable has been spending "the long night" yarn-walling it, speaking to the folks behind the HBO show, and watching the series frame by frame so you don't miss a spiral, polar bear, John Carpenter reference, or confirmed fan theory.

In the fourth season of the HBO series, this time helmed by showrunner Issa López, police Chief Liz Danvers (Jodie Foster) and state trooper Evangeline Navarro (Kali Reis) have one hell of a chilling investigation on their hands — and we've gone absolutely yarn-wall on it ourselves. Read it all!

Everything to know about True Detective: Night Country — before you watch

• Watch the trailer

• Read Mashable's True Detective: Night Country review

• Find out: Is the long night a real thing?

• Heed our warning about episode 2 — trust us

How was True Detective: Night Country made?

• How the corpsicle was brought to life

• The most WTF moment in the series — and how it was made

• Isabella Star LaBlanc and Anna Lambe on Indigenous representation in the series

Every clue, tracked

• Every opening credits clue you may have missed

• What's deal with the spirals?

• Is Travis the father of Rust Cohle?

• How writer/director Issa López could be a clue to True Detective: Night Country's mystery

• What's with the polar bears?

• How the Dyatlov Pass incident ties in

• Season 4: Burning questions explored

• Episode 5 has a very dark, very important scene

About that finale...

• Who killed the scientists?

• What actually happened to Navarro?

• Was time travel involved?

What to watch after True Detective: Night Country

• This episode of The X-Files

• John Carpenter's The Thing

How to watch True Detective: Night Country

True Detective airs Sunday nights on HBO/Max at 9 p.m ET/PT.