Shashawnee Hall
Agent Marvin Novack in JAG was played by Shashawnee Hall, whose acting career continued to flourish post JAG, appearing in Lie to Me, Medium, NCIS, The Closer, as well as in hit films such as Bruce Almighty and Evan Almighty, as well as the TV series Life. Since then he has added plenty of acting credits to his name.
Ned Vaughn
Ned Vaughn, who played the character of Lt. Carl Barrett in JAG, went on to star as Mitch Anderson in 24’s fourth season, and you can also see him in Cane and Commander in Chief.