The episode was the 5th and final episode of The Second Series of The Mary Morstan Mysteries, and first ran in 4 parts between 21st April 2015 -7th May 2015. Moriarty lays all his money on the line with a bet on Steve Dixie winning his next fight. With his simian serum, he is sure there is no way he can lose. But should this travesty occur, to what depth will he sink to recover his fortune?