SSA Derek Morgan left the BAU on Criminal Minds.
SSA Derek Morgan faced a lot of new challenges this season. After being kidnapped by a group of villains, Derek mentally escaped the horrendous torture he was subjected to. In his visions, we met his dead father, Hank, for the first time. After being saved by the rest of the team, Morgan awoke to discover that Savannah, his girlfriend, was pregnant.
Overjoyed with the news, Morgan asked Savannah to marry him. Just before their child was due, Morgan was targeted by one of the henchman's father, who was intent on killing him. After this angry man shot Savannah, who was eight months pregnant, Morgan went rogue from the team to track him down. Once Morgan arrested the man, he returned to the hospital, where he and Savanna welcomed their new baby boy into the world.
After much consideration—and 11 years of dutiful service—SSA Derek Morgan decided to leave the BAU to focus on his growing family.
Watch Criminal Minds on CBS.