It's time for Doctor Who and Sherlock to cross paths, but it won't quite be in the way fans were hoping for.

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Peter Capaldi's Twelve and Benedict Cumberbatch's Sherlock Holmes will probably never share the screen, but that doesn't mean the Doctor will never bump into Sir Arthur Conan Doyle's consulting detective. In fact, they already have.

Based on the 1994 novel New Adventures by Andy Lane, Big Finish has released "All-Consuming Fire." Sylvester McCoy returns as the Seventh Doctor while Nicholas Briggs, the voice of the Daleks, takes on the role of Sherlock.

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When the Vatican's Library of St. John the Beheaded is robbed, Holmes and Watson are on the case. Little do they know a certain Time Lord is also in town. While Seven will initially be one of Sherlock's prime suspects--he can be rather suspicious, after all--the trio will soon find themselves thrown together in a fight to save the world.  

"Holmes and his loyal friend Watson soon realize this suspect is also their greatest hope: war is brewing and an Old God is rising, to save humanity they need The Doctor as much as he needs them," Big Finish teased.

Listen to the trailer here!