Tom Nowicki

On his first day as an intern, an idealistic Dr. Devon Pravesh faces the harsh realities of medical care; resident Conrad Hawkins teaches him unconventional methods for treating patients; Conrad goes head-to-head with Dr. Solomon Bell.

The search for Nathan becomes increasingly dangerous, and Dan's life hangs in the balance. Brooke is surprised when her father (recurring guest star RICHARD BURGI) returns. And Clay and Quinn reconnect with Logan (recurring guest star PIERCE GAGNON).

Mac and Riley go missing and wake up 24 hours later in a cornfield with no memory of how they got there; they must unravel the mystery and find out how to get rid of the nanotrackers in their bodies, no matter the cost.

Mac and Desi travel with Bozer to his childhood home when his aunt dies in a tragic accident; they soon discover she may have been murdered for trying to expose the city's contaminated water supply.