Season 4
The fourth season of the American television comedy series Rules of Engagement premiered as a mid-season entry on March 1, 2010 and concluded on May 24, 2010. It consists of 13 episodes, each running approximately 22 minutes in length. CBS broadcast the fourth season on Monday at 8:30 pm in the United States between How I Met Your Mother and Two and a Half Men.
Episodes
1 Flirting Mar 1, 2010 
2 Snoozin' for a Bruisin' Mar 8, 2010 
3 Atlantic City Mar 15, 2010 
4 Ghost Story Mar 22, 2010 
5 The Four Pillars Mar 29, 2010 
6 3rd Wheel Apr 5, 2010 
7 Indian Giver Apr 12, 2010 
8 Free Free Time Apr 19, 2010 
9 The Score Apr 26, 2010 
10 The Surrogate May 3, 2010 
11 Reunion May 10, 2010 
12 Harassment May 17, 2010 
13 They Do? May 24, 2010