Sherlock season 4 teaser promises 'it’s not a game anymore'

It’s not long, but there’s a lot squeezed into the 47 seconds of Sherlock’s latest season 4 teaser.

"The roads we walk have demons beneath… and yours have been waiting for a very long time," states the voiceover, before the visuals switch to a burning building.

"What's the very worst thing you can do to your very best friends?" Toby Jones - appearing as Sherlock antagonist Culverton Smith - asks, as Sherlock clutches a pistol and Watson sits in the bottom of a well. "Tell them your worst secret.”

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But perhaps most shocking of all is Sherlock’s “I love you” at the close of the teaser… well, he's not known for being warm and cuddly, is he?

If the first trailer for Season 4 of Sherlock is anything to go by, this series will be at a much darker storyline for the detective and company.

The first episode will air on New Year's Day at 9pm on BBC1.

Vikki Blake is GamesRadar+'s Weekend Reporter. Vikki works tirelessly to ensure that you have something to read on the days of the week beginning with 'S', and can also be found contributing to outlets including the BBC, Eurogamer, and GameIndustry.biz. Vikki also runs a weekly games column at NME, and can be frequently found talking about Destiny 2 and Silent Hill on Twitter.