When a sore throat affects Rachel's singing voice, she goes into panic mode. Meanwhile, Kurt tries to change his persona to impress his father, and Puck makes a strategic move to elevate his social status.
Quest roles:
Heather Morris(Brittany S. Pierce), Mike O'Malley(Burt Hummel), Naya Rivera(Santana Lopez), Harry Shum Jr.(Mike Chang), Brad Ellis(Brad the Piano Player), Josh Sussman(Jacob Ben Israel), Ashley Fink(Lauren Zizes), Rizwan Manji(Dr. Gidwani), Zack Weinstein(Sean Fretthold), Eve Gordon(Mrs. Fretthold), Dijon Talton(Matt Rutherford), Alexander Wenger(Dweeb)