The TGS staff rallies as Jack's father's health hangs in the balance. Liz enjoys newfound fame as a relationship expert. When Tracy's high school invites him to speak at graduation, Kenneth helps him overcome embarrassing memories.

Adam Horovitz, Adam Levine, Alan Alda, Clay Aiken, Cyndi Lauper, Donald Glover, Elvis Costello, Mary J. Blige, Michael McDonald, Mike D, Moby, Napiera Groves, Paula Pell, Sara Bareilles, Sheryl Crow, Steve Earle, Talib Kweli, Wyclef Jean