Sacha Dhawan is going to guest star in Sherlock.
The actor is best known for his roles in The History Boys, In the Club, 24: Live Another Day and Mr Selfridge.
He also appeared in Sherlock writer Mark Gatiss’s Doctor Who drama An Adventure in Space and Time.
The second season of In the Club concluded on BBC One earlier this month.
Sherlock Season 4 is expected to air on BBC One in early 2017.
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