CBS has released the official episode description for the season 3 finale of SWAT. SWAT Season 3 Episode 21 is titled “Diablo”.
SWAT 3×21 “Diablo” Episode Guide
The SWAT team searches for a group of drug smugglers who crash a plane in a Los Angeles suburb and scatter, after a joint mission with the DEA to stop the shipment goes awry. Also, Hondo tries to make amends with Nichelle, Luca experiences anxiety about his return to the field, and Deacon hesitates when asked to speak to a group of recruits about mental health.
Douglas Aarniokoski directed the episode written by Munis Rashid & Robert Wittstadt. SWAT Season 3 Episode 21 airs on May 20 at 10|9c on CBS.