03/26/2012 (10:00PM - 11:00PM) (Monday) : GRACE GUMMER AND RYAN TEDDER OF ONEREPUBLIC GUEST STAR - The team deals with the aftermath of the workshop. Ivy (Megan Hilty) remains in the dark about her fate, while Derek (Jack Davenport) recruits Karen (Katharine McPhee) to help him steal the musical from Tom and Julia (Christian Borle and Debra Messing). Eileen (Anjelica Huston) must face up to her ex-husband, Jerry (guest star Michael Cristofer), when their daughter Katie (guest star Grace Gummer) pays a surprise visit from India. Raza Jaffrey, Brian d'Arcy James and Jaime Cepero also star. Grace Gummer, Ryan Tedder of OneRepublic and Michael Cristofer guest star.