Trevor Goddard
Trevor Goddard played the character of Lt. Commander Michael Brumby or Mic between 1998 and 2001, a role which largely increased his fan base. Sadly Trevor died of a drug overdose in his LA home in 2003. Prior to his untimely death, the English actor was considered for the role of James Bond in Casino Royale.
Steven Culp
In JAG, Steven Culp played the FBI agent Clayton Webb, but he has many more acting credits under his belt. He featured in The West Wing, NCIS, and 24, as well as hospital drama ER, and is known by many for his role as Rex Van de Kamp on Desperate Housewives. In fact, he managed to juggle playing all the roles simultaneously, at the same time as JAG, as well as a guest spot in CSI and some other gigs. Now that is a hard worker for you!