"Sherlock" Season 4 continues to look dark in the series' latest preview.

When we pick up with the adventures of Sherlock Holmes (Benedict Cumberbatch) and Dr. John Watson (Martin Freeman), expect them to be intense. The new preview, released this weekend, reinforces the message we saw in an earlier teaser -- that "it's not a game anymore." It also takes the warning a step further. From what the 40-second video shows us, there are demons that have been lying in wait and a chilling villain, played by Toby Jones.

The preview offers interesting glimpses at the episodes to come. We see the titular detective in strange circumstances n various intriguing scenes: in front of a burning house, sprawled out on a table, and clutching a gun. Yet, after all the darkness, the trailer ends on an unexpected note: Sherlock looks straight into the camera and declares, "I love you."

"Sherlock" premieres on PBS Masterpiece on Jan. 1.

Sherlock TV Show Poster
Sherlock
TV14July 25, 2010
Based on 24 critics

A contemporary spin on the novels by Sir Arthur Conan Doyle, featuring the peerless Sherlock Holmes. Read More