The Hustler (Originally Transmitted 12 Sep 1974)
This episode focuses on gambling within the prison. "Horrible" Ives shows early on his blatant dishonesty when making small bets with Fletch.
Fletch organises a game of Snakes and Ladders in the coke store and has a bet with Ives that he can get away with it.
Ives, of course, snitches on Fletch and the game is uncovered by the prison authorities. But just when you think Fletch has lost, he always, of course, had something up his sleeve!