The criminal mastermind in the Sherlock Holmes-verse has been revealed on CBS's "Watson." It's Randall Park in a polo shirt.

A new actor has now officially played Sherlock Holmes' Moriarty. In a surprise casting move, Watson reveals Randall Park plays its Moriarty.

The creator of the new CBS drama Watson opens up about the unexpected casting choice for the villain Moriarty, which has been kept hidden.

The story includes details from the series premiere of CBS’ drama series Watson. Five and a half years after the end of Elementary, CBS is returning to the world of Arthur Conan Doyle with Watson, which debuted tonight after the AFC Championship game.

CBS ’s new medical drama Watson has already left viewers speechless with its casting reveal of a classic villain. The series, which aired its pilot episode immediately after the NFL AFC Championship between the Kansas City Chiefs and the Buffalo Bills, is a daring spin-off of Arthur Conan Doyle’s fictional detective Sherlock Holmes.

Colin Bentley/CBS The series premiere of CBS' Watson featured a shocking casting for the role of antagonist James Moriarty - but how will the twist continue to play out? Warning: Spoilers below for the series premiere of Watson During a sneak peek of the series,

Dr. John Watson ( Morris Chestnut ), you’re going to want to keep a close eye on the man closest to you! The Watson series premiere ended with the reveal of who’s playing Moriarty — Randall Park! — when Shinwell Johnson ( Ritchie Coster ), Watson and Sherlock Holmes’ friend who now works as an administrator at the clinic, meets with him.

A new spin is put on the Sherlock Holmes story for Watson, which premiered with a surprising casting reveal for Moriarty.

Colin Bentley/CBS The series premiere of CBS' Watson featured a shocking casting for the role of antagonist James Moriarty — but how will the twist continue to play out? Warning: Spoilers below for the series premiere of Watson During a sneak peek of the series,