ITV3 Sherlock Holmes Catch up on the ITV Hub Sherlock Holmes is one of the world's greatest and most popular fictional detectives. His acute perception and powers of observation are called upon in solving a compendium of crime. As ever, Dr Watson is on hand as his indispensable assistant. 2 episodes available to watch Share this programme: Share on Facebook Share on Twitter Share on Google+ Series 2 8. The Sign of Four Sat Saturday 1 Jul 9.20am A young woman receives a summons to meet her mysterious benefactor. Other episodes The Master Blackmailer Sun Sunday 9 Jul 12.30pm Holmes takes a menial role to flush out reclusive blackmailer.