[s13e15] Annihilator -

: Season 13 notably integrated Daniel Henney as Matt Simmons, a regular cast member following the cancellation of the spin-off Criminal Minds: Beyond Borders , as noted on Wikipedia .

In this episode, the Behavioral Analysis Unit (BAU) travels to St. Louis to investigate a brutal quadruple homicide involving a group of roommates. The case is complicated by the presence of Linda Barnes, the FBI's Assistant Director of National Security, who joins the team to oversee their work and evaluate their performance according to TheTVDB and Rotten Tomatoes . Key Features and Plot Points [S13E15] Annihilator

: This episode is part of a major story arc involving Linda Barnes (played by Kim Rhodes), whose bureaucratic interference threatens the stability and future of the BAU. : Season 13 notably integrated Daniel Henney as