Walker : Season 4

It's Walker's birthday and Geri is pulling out all the stops, but her plans are thwarted.

Walker, Cassie and Trey are charged with keeping an 80-year-old grandmother and witness safe.

Trey and Liam try to help Walker figure out his next steps with Geri; Liam confides in Walker.

Walker's lies about the Jackal case finally catch up to him; Stella makes a shocking realization.

Geri is presented with an interesting offer, and Liam jumps in to help.

Walker, Trey and Cassie prepare for what Captain James has in store for them at HQ.

Stella goes to Bonham for self-defense training; August excels in his boot camp training.

Liam express his concerns about Walker to Trey. Walker becomes more invested in the case as Captain James asks him to take a break. Stella continues her search for the necklace and starts putting together the pieces of the mystery. August goes to his dad for help with a school project. Meanwhile, Cassie and Detective Luna take their relationship to the next level.

Geri discussed her new business venture with Walker, but there is more to her return. James, Cassie and Trey appear to make some headway in their investigation. Meanwhile, Stella and August make a startling discovery. Lastly, Bonham and Abby have differing views about their retirement plans, with Liam serving as a referee.