Which show does giddeon's replacement appear on criminal minds?

Gideon's replacement on "Criminal Minds" is Agent David Rossi, portrayed by Joe Mantegna. Rossi first appears in Season 3, Episode 1, titled "Demonology." He is a seasoned profiler with a significant history in the FBI and brings a wealth of experience to the BAU team. His character helps fill the void left by Gideon's departure while adding his unique perspective and expertise.