Henney will play FBI agent Matt Simon, as he did in the first season, Echo Global Group said.
The main cast of season one, including Gary Sinise, Alana de la Garza, Tyler James Williams and Annie Funke, will all carry over to the second season, which is scheduled to air in 2017.
The “Criminal Minds” spin-off premiered in March on CBS as the most watched TV series in its time slot.
Henney has also appeared in “Dear My Friends,” an ongoing South Korean TV series broadcast on the cable channel tvN. (Yonhap)