Nick Gehlfuss as Dr. Will Halstead, Attending Emergency Physician; Yaya DaCosta as April Sexton, RN; Torrey DeVitto as Dr. Natalie Manning, Pediatric/Emergency Resident; Rachel DiPillo as Dr. Sarah … why did jeff hephner leave chicago fire John Kim. Plot. Is a new episode of Chicago PD on tonight? (June 1) Rebecca Jones was launched in Chicago Fireplace Season 2. Jeff Clarke is a former U.S. Marine and Firefighter/Lieutenant from Firehouse 25, Firehouse 33, and Firehouse 51. In 2016, he appeared in the National Geographic’s “MARS”, followed by reprising his role in NBC’s medical spinoff of, “Chicago Fire,” “Chicago Med,” as Jeff Clarke until 2017. In January 2019, he co-starred in the film An Acceptable Loss. He is an actor, known for Peppermint (2018), Interstellar (2014) and Boss (2011). I think we should be doing more crossovers. why did jeff Guys in Trouble - Update History