Watson has officially cast Once Upon a Time 's Robert Carlyle to recur in Season 2 as Sherlock Holmes, who was presumed dead throughout all of the first season. According to Variety, Sherlock will resurface and force Morris Chestnut's character to face a secret from his own past that's actually hidden in his own body.

Robert Carlyle (Toxic Town, Trainspotting) is set to bring to life the legendary literary detective Sherlock Holmes in the CBS series Watson for Season 2. Carlyle will appear in a recurring guest role,

Carlyle will recur as the world's greatest detective opposite Morris Chestnut as Dr. John Watson. Watson's new cast member is far from elementary. Entertainment Weekly has confirmed that Once Upon a Time alum Robert Carlyle has been cast as Sherlock Holmes opposite Morris Chestnut as Dr.