Matthew Gray Gubler in Criminal Minds (2005)
Spencer Reid
The series followed a group of profilers from the F.B.I. B.A.Unit as they use behavioral analysis and profiling to investigate crimes and find perpetrators.
During its 15 years, the original cast had several changes and it finally featured 16 agents appearing as major characters in at least one season.
Criminal Minds success also spawned a media franchise and a Korean adaptation.
To celebrate the end of the series, which Criminal Minds Agent is your favorite?