The Middle Season 2 Episode 6 (The Middle s02e06) with title “Halloween” aired on Wednesday, October 27th 2010 at 08:00 pm via ABC Network.
Here is summary for The Middle Season 2 Episode 6 :

Frankie is excited over being invited to an adult neighborhood Halloween party. But will she be able to get Mike to dress up in a costume, or will he have his own idea of fun? Meanwhile, a melancholy Sue’s spirits are lifted when she discovers that Reverend TimTom is back in town and hosting a Halloween church event;