The Middle Season 2 Episode 7 (The Middle s02e07) with title “A Birthday Story” aired on Wednesday, November 3rd 2010 at 08:00 pm via ABC Network.
Here is summary for The Middle Season 2 Episode 7 :

Frankie and Mike are speechless when, on his ninth birthday, Brick demands to hear the true story about the day he was born, which has remained a mysterious Heck family secret.