 Daniel Lucas, portrayed by Eddie Cibrian, is the Special Supervisory Agent for the FBI Criminal Investigations Unit, a group located at the agency's Washington D.C. headquarters.He is an old acquaintance of FBI investigator Agent Graham Kelton, as they graduated from the FBI's training academy together.After Kelton was murdered by Edward Morell, Lucas transferred himself to Atlanta to lead the investigation in the Sara Collins case and bring Kelton's murderer to justice.