Rules of Engagement Season 5 Episode 7 (Rules of Engagement s05e07) with title “Mannequin Head Ball” aired on Monday, November 1st 2010 at 08:30 pm via CBS Network.
Here is summary for Rules of Engagement Season 5 Episode 7 :

When Jeff can’t get out of the lease for a retail space he rented for Audrey’s fleeting cookie business, he and Adam invent a new game involving the heads of mannequins. Meanwhile, Russell and Timmy go on a double date.