The fourth season of Ang Probinsyano, a Philippine action drama television series, premiered on ABS-CBN's Primetime Bida evening block and worldwide on The Filipino Channel. The season ran from November 8, 2017 to March 14, 2018, airing a total of 91 episodes. The series stars Coco Martin as SPO2 Ricardo Dalisay, together with an ensemble cast consisting of Susan Roces, Jaime Fabregas, Angel Aquino, John Arcilla, Jhong Hilario, John Prats, Sid Lucero, Mitch Valdes, Yassi Pressman, Eddie Garcia, and Lito Lapid.