Sherlock co-creator Mark Gatiss says Mycroft Holmes is even more intelligent than the detective himself.

References in the original Sherlock Holmes stories suggest Sherlock’s brother does indeed possess superior powers of observation and deduction, although his sedentary nature prevents him from being an effective detective.

And Gatiss, who plays Mycroft in the series, says he’d like future episodes of the show to reveal more about the brothers’ abrasive relationship and Mycroft’s own talents.