THE MIDDLE
ABC, 8:00 p.m. ET
Both of ABC’s best sitcoms are jumping on the same subject tonight, and doing episodes tied to birthday celebrations on Leap Year. On this series, while some of the Heck family prepares for a self-designed Leap Night to celebrate Sue’s Feb. 29 birthday, young Brick (Atticus Shaffer) is distracted by another rare event: He’s being circled by his first-ever potential girl friend. But as he learns more about her, his expression turns from happiness… to horror.