Since its premiere in 2005, Criminal Minds has captivated audiences worldwide with its gripping storytelling and compelling characters, but a cameo from John Gubler, Matthew Gray Gubler’s feather went over many viewers’ heads. The show, focused on the FBI’s Behavioral Analysis Unit (BAU) as they track down some of the most dangerous criminals in the country, introduced viewers to fan-favorite characters like Criminal Minds’ Dr. Spencer Reid, portrayed by Matthew Gray Gubler. As a socially awkward but brilliant profiler with a penchant for statistics and eidetic memory, Reid quickly became a beloved figure in the series.

https://screenrant.com/john-gubler-matthew-gray-gubler-dad-criminal-minds-cameo/