Bash tries saving a couple whose wedding was waylaid by gunfire; Mags' demanding teen patient needs birth control; June struggles with an old habit; an activist patient puts Theo in his place.

A software glitch takes down the emergency department; Bash explores new terrain; Mags searches for a new cardiologist; June is fed up with her bosses; Theo attempts a stable dating life.

Mags shares big personal news with her colleagues, which has an effect on Bash. June sees a patient with a specific phobia. Theo bumps against a protective family doctor while trying to help a returning young patient. Claire looks for help but finds Devi stretched thin.

Mags undergoes transplant surgery and copes with the aftermath aided by her family and Bash. Bash balances personal and professional stress. June confronts Novak's self-sabotaging behaviour. Theo navigates a visit from his father and thwarts Liz's attempt to meet his family.

Bash passes on an opportunity, and works cases where things are not as they appear. Mags returns to York Memorial. June navigates loss professionally and personally. Theo goes out on a limb again for a patient. Claire is confronted by Devi and her colleagues about recent challenges.