S1, E18: Rachel panics when a sore throat affects her singing, Kurt tries to change his persona to impress his father, and Puck makes a strategic move to elevate his social status.

Starring Mike O'Malley, Naya Rivera, Heather Morris
S1, E18: Rachel panics when a sore throat affects her singing, Kurt tries to change his persona to impress his father, and Puck makes a strategic move to elevate his social status.