Nighthawk - Nickname of Jack Killian (Gary Cole), a former police detective turned late night radio talk show host on the drama MIDNIGHT CALLER/NBC/1988-91. Earlier in his career, Jack accidentally killed his police partner in a shootout with street thugs. Dismissed from the force he found employment as a talk show host on San Francisco radio station KCJM (98.3 FM). His late night persona being the "Nighthawk." His work phone number was 555-TALK.