Sam and Luka go on the search for her runaway son, Alex. Meanwhile, Pratt and Lewis guide Abby, Neela and Ray, who have become R2's, on how to teach the new interns.
Emotions — Brenda Lee
Played at the end of the episode.
The Tracks Of My Tears — Smokey Robinson & The Miracles
As Dr. Kovac and nurse Sam Taggart drive to Colorado to find Sam's son Alex.
Will You Love Me Tomorrow — The Shirelles
Leavin' On Your Mind — Patsy Cline