Pay to Play is the seventeenth episode of the fourth season. It was released on 9 May 2008.
The murder of a rapper puts Charlie to work analyzing the mathematics of the music business, in the same week that Amita's parents come to town, and Megan has asked for a week off without discussing it with Don.
The de facto antonym of 'fair and open', this indicates a situation where, to get in the game, there is a price up front - an ante. There is also a suggestion that unmet debts may prove bad for one's health, and perhaps that everyone involved has skin in the game. The term is now commonly used for the gray area of the intersection of politics and business, and the buying of political favors.