» characters · dr. thomas charles "tc" callahan
Dr. Thomas Charles "TC" Callahan was portrayed by Eoin Macken. A former army medic and Ranger from Baltimore who witnessed his brother Thad's death in Afghanistan, and immediately had to decide to donate his heart to a fellow soldier. After being discharged, he returned with PTSD and his relationship with Jordan ended. In the first season, his recklessness and sports betting put him in trouble, especially with Ragosa, and was secretly dating Landry. In the second season, he rekindles his relationship with Jordan, but they break up again after she miscarries. In the third season, he dates Jessica Sanders until he learns of her involvement in the sale of the hospital. Afterwards, he leaves on a humanitarian mission with Syd to Syria, which gets complicated quickly.