Community Season 2 Episode 3 (Community s02e03) with title “The Psychology of Letting Go” aired on Thursday, October 7th 2010 at 08:00 pm via NBC Network.
Here is summary for Community Season 2 Episode 3 :

Pierce deals with the death of his mother and the group comes together to comfort him in his time of need. Professor Duncan struggles to take over the anthropology class with no training, as Professor Bauer takes an unexpected leave of absence after her classroom hijinks put Jeff Winger in the hospital.