First time the expression "the red right hand" has been said in the show after 11 episodes, it's also the title of the main song of the show.
The 1922 Investec Derby, held at Epsom Downs Racecourse, took place on June 3rd. The race was won by James Buchanan, 1st Baron Woolavington's horse, Captain Cuttle, and jockey Steve Donoghue, with a time of 2:34.6 - which, at the time, was the third fastest win time since they had started recording that information in 1846.