The fourth season of The Fosters premiered on June 20, 2016 and ended on April 11, 2017. The season consisted of 20 episodes and stars Teri Polo and Sherri Saum as Stef Foster and Lena Adams, an interracial lesbian couple, who foster a girl, Callie (Maia Mitchell) and her younger brother, Jude (Hayden Byerly) while also trying to juggle raising Latino twin teenagers, Mariana and Jesus (Cierra Ramirez and Noah Centineo), and Stef's biological son, Brandon (David Lambert). Premise In this season, Callie and a new friend, Aaron (Eliott Fletcher) team up to find out what happened to an old friend of hers after being convicted of a murder 6 years earlier, and go down a dangerous path that's filled with unwanted surprises. Meanwhile, after adopting AJ, Mike struggles with fatherhood while dealing with his girlfriend, Ana. Still recovering from his break up with Conor, Jude starts spending more time with Noah (Kalama Epstein), an avid gay churchgoing Christan who has a wild side. Mariana struggles to let go of Nick (Louis Hunter) after the incident at school. Jesus and Emma begin a strictly sexual relationship, and are considering getting back together. Stressing about getting into Juilliard, Brandon goes to desperate measures in order to secure his place in the school, which doesn't sit well with Lena. Cast Main cast Teri Polo as Stef Adams Foster Sherri Saum as Lena Adams Foster Noah Centineo as Jesus Adams Foster Hayden Byerly as Jude Adams Foster David Lambert as Brandon Foster Maia Mitchell as Callie Adams Foster Cierra Ramirez as Mariana Adams Foster Danny Nucci as Mike Foster Recurring cast Tom Williamson as AJ Hensdale Jordan Rodrigues as Mat Tan Elliot Fletcher as Aaron Baker Amanda Leighton as Emma Kalama Epstein as Noah Izabela Vidovic as Taylor Louis Hunter as Nick Stratos Annika Marks as Monte Porter Denyse Tontz as Cortney Strathmore Brandon Quinn as Gabriel Duncroft Kerr Smith as Robert Quinn Alexandra Barreto as Ana Gutierrez Alex Skuby as Joe Gray Hugh Scott as Doug Harvey Levi Fiehler as Troy Johnson Daffany Clark as Daphne Keene Mark Totty as Craig Stratos Jared Ward as Drew Turner Michael Traynor as Craig Adam Irigoyen as Kyle Snow Meg DeLacy as Grace Mullen Hope Olaidé Wilson as Diamond Guest cast Annie Potts as Sharon Elkin Rob Morrow as Will Lorraine Toussaint as Dana Adams Bruce Davison as Stuart Adams Suzanne Cryer as Jenna Paul