Seeking to prove her father innocent of murder, a student gets Trivette to help. Meanwhile, registering for their wedding shows Alex a part of Walker she'd not seen before.

In the two-hour season finale, a notorious gang Walker put away returns for brutal revenge. The gang escapes from prison and targets each Ranger. As his closest friends are marked for death, Walker is torn between catching the killers or helping his wife, who is rushed to the hospital when she goes into labor.

Meanwhile, Trivette reunites with an old flame and prepares to get on one knee and ask for her hand in marriage, and questions are finally answered regarding the infamous Hayes Cooper.

In the two-hour season finale, a notorious gang Walker put away returns for brutal revenge. The gang escapes from prison and targets each Ranger. As his closest friends are marked for death, Walker is torn between catching the killers or helping his wife, who is rushed to the hospital when she goes into labor.

Meanwhile, Trivette reunites with an old flame and prepares to get on one knee and ask for her hand in marriage, and questions are finally answered regarding the infamous Hayes Cooper.