Sherlock's Mark Gatiss to Make Directorial Debut with BBC's 'The Tractate Middoth' This Christmas Sherlock co-creator Mark Gatiss is set to spruce up your holidays with a little horror this year – he’ll be bringing an adaptation of M.R. James’ The Tractate Middoth to BBC Two for Christmas. The drama will be accompanied by a new documentary on By Lacy Baugher for Drama on 9/9/2013
