Harvey and Jessica's relationship is tested when Harvey defends someone from her past. Also, Louis assigns Mike his first solo case, a pro bono that has him itching for a win.
Mary and Darnley wed in a lavish affair, which proves to be a successful decision in regards to her political standing. James makes an interesting discovery about Greer, while Elizabeth frantically tries to salvage England's power.
The SRU races to a high school when a bullied teenager goes on a rampage, but a family member compromises the rescue plan.
While working on a high-stakes gun raid, Andy (Missy Peregrym) and Gail (Charlotte Sullivan) stumble upon a victim of domestic abuse (guest star Kristin Booth) whose brutal experience in the system has taught her not to trust the police.
Jake, Mal and Des discover a murder while on a fishing trip; Rose's frenemy has dark plans; Leslie and Callum team up; a secret backfires on Des.