Can’t Wait For ‘Sherlock’ Season 4 Release Date? Check Out This Coloring Book In The Meantime!

Although executive producer Steven Moffat hasn't confirmed a specific "Sherlock" season 4 release date yet, he did assure fans that Benedict Cumberbatch and Martin Freeman will be coming back on set for an "April-ish" filming next year.

Thankfully, a Christmas special - or at least a stand-alone episode during the season - will be airing sometime this year. Fans can look forward to a "polished" Sherlock Holmes and a "more uptight" Dr. Watson.

Fans who couldn't wait for the yet-to-be-announced "Sherlock" season 4 release date opted for reruns of the past three seasons. However, with only three episodes to watch for each season, that doesn't seem to be enough.

Thankfully, Mike Collins created a coloring book featuring the famous BBC series called "The Mind Palace," based on the compartment in Sherlock's head where he retreats to sort out his own thoughts.

For $11.21 die-hard fans can doodle on Benedict Cumberbatch's face and even exercises their brains with hidden messages in the illustrations.

"'The Mind Palace' is a unique celebration of the rich visual landscape of Sherlock, featuring over 50 intricate pieces of artwork by artist Mike Collins. Recreate classic scenes, add colour to intricate interiors and illuminate the fascinating world of Sherlock with the power of your imagination," the description on Amazon said.

It continued, "A vital clue from each episode is hidden within the original black and white illustrations, and only by completing the scene can they be found. Fill Sherlock's world with colour and find the secrets hidden within 'The Mind Palace.'"

According to Den Of Geek, Collins is best known for his work on the "Doctor Who" graphic novel and Panini's "Doctor Who" Magazine.

Unlike the "Sherlock" season 4 release date, which is still non-existent, "Sherlock: The Mind Palace," will be out this Nov. 5, 2015.