Mark Gatiss reveals physical toll of playing post-war detective in hit series Bookish

Sherlock co-creator Mark Gatiss is back on solving crimes in post-war London as hit detective drama Bookish returns for a second series.

Speaking ahead of the new run, the 59-year-old actor and co-writer Matthew Sweet open up about crafting twisty murder plots and why playing an athletic sleuth leaves Mark's knees "going off like pistol shots"