McDermott is set to replace Julian McMahon, who is departing the CBS procedural after three seasons. McDermott's casting makes him a full-time member of the Dick Wolf universe after recurring on Wolf's Law & Order: Organized Crime on NBC as mob boss Richard Wheatley. Details of McDermott's role haven't been revealed. McMahon's final episode as Jess LaCroix, the head of FBI Most Wanted Unit’s team assigned to the most extreme cases, is scheduled to air March 8. McDermott is expected to make his debut in Episode 17 airing in April. FBI: Most Wanted marks McDermott's return to CBS after starring on Stalker in the 2014-2015 season.