NCIS has been through a lot over the course of its 23-season run, and this includes numerous cast changes. Perhaps the biggest casting change came when Mark Harmon exited at the beginning of Season 19, with his departure thought to be the “death knell” of NCIS (at least at the time). Seasons later, Sean Murray has recalled learning about his co-star's decision to leave... and the phone call that made him feel better about it.
Murray has been on NCIS as Special Agent Timothy McGee since the very first season. So, both he and Brian Dietzen, who has been playing Jimmy Palmer since Season 1, have been on hand to witness all the casting changes. While speaking with Dietzen and Diona Reasonover on the Partners & Probies podcast, Murray reflected on the switch-ups, noting change is always hard.
