Episode: 4x01 | Airdate: Apr 8, 2021 (25 min)
Newly employed as an FBI Special Agent, Cullen finds that the job is not what he expected, while Officers Tolbeck and Reinhardt's bond grows at the SDPD. Dirk and Sue begin their new adventure as a newly married couple.
Episode: 4x02 | Airdate: Apr 15, 2021 (24 min)
The SDPD brings in a PR representative to address Tolbeck's accident and Dirk and Sue settle in at The Collective. Cullen and his new partner Risoli begin to monitor a former cult member.
Episode: 4x03 | Airdate: Apr 22, 2021 (21 min)
Cullen and Risoli's interrogation of the former Collective member reveals some startling new information. Meanwhile, Dirk meets his adoptive daughter, Madison.
Episode: 4x04 | Airdate: Apr 29, 2021 (21 min)
After Magnolia fails to infiltrate The Collective, Cullen and Risoli are invited to meet with its leader, Terry, and Sue returns from her meeting a changed woman.
Episode: 4x05 | Airdate: May 6, 2021 (21 min)
Det. Cooper fills in the blanks of last night's events to a woozy Cullen while Dirk finally meets Terry. Janice and Fatima return to dispatch.
Episode: 4x06 | Airdate: May 13, 2021 (22 min)
Dirk takes matters of his marriage into his own hands after teaming up with the FBI and Dustin, who in turn is frustrated with Cullen's lack of enthusiasm and commitment to his documentary based on The Collective.
Episode: 4x07 | Airdate: May 20, 2021 (22 min)
In this documentary from Jürgen Leibbrandt, the FBI investigates supposed cult The Collective and seeks the truth behind who really shot Agent Risoli.
Episode: 4x08 | Airdate: May 27, 2021 (22 min)
After reuniting, Cullen and Tolbeck realize they have information that could take down The Collective.
