▁on ▁February ▁ 1 9 , ▁ 2 0 2 0 . ▁It ▁follows ▁a ▁group ▁of ▁criminal ▁profil ers ▁who ▁work ▁for ▁the ▁F BI ▁as ▁members ▁of ▁its ▁Be havior al ▁Analysis ▁Unit ▁( BA U ), ▁using ▁behavior al ▁analysis ▁and ▁profil ing ▁to ▁investigate ▁cr imes ▁and ▁find ▁perpet rat ors . ▁The ▁show ▁tells ▁the ▁story ▁of ▁the ▁team ▁as ▁they ▁work ▁various ▁cases , ▁and ▁tack le ▁their ▁personal ▁strugg les . ▁ ▁The ▁show ' s ▁original ▁main ▁cast ▁consisted ▁of ▁seven ▁characters : ▁Jason ▁G ide on ▁( M andy ▁Pat ink in ), ▁A aron ▁Hot ch ner ▁( Th omas ▁Gib son ), ▁Elle ▁Green away ▁( L ola ▁Gla ud ini ), ▁D erek ▁Morgan ▁( Sh em ar ▁Moore ), ▁Sp encer ▁Re id ▁( M att hew ▁Gray ▁G ub ler ), ▁Jenn ifer ▁J are au ▁( A . ▁J . ▁Cook ), ▁and ▁Pen el ope ▁Gar cia ▁( K irst en ▁V angs ness ). ▁The ▁cast ▁under w ent ▁major ▁changes ▁throughout ▁the ▁series ' ▁run , ▁with ▁several ▁of ▁the ▁show ' s ▁original ▁members ▁being ▁replaced ▁by ▁nine ▁additional ▁st arring ▁characters : ▁Em ily ▁Pr ent iss ▁( P aget ▁B rew ster ), ▁David ▁Ros si ▁( J oe ▁M ante g na ), ▁Ash ley ▁Se aver ▁( R ach el ▁Nich ols ), ▁Alex ▁Bla ke ▁( Je anne ▁Tri pp le horn ), ▁Kate ▁Cal la han ▁( J