Complete story — includes the ending
Barnes begins his killing spree. Knowing Gordon's awareness, Barnes attempts to frame him for murder but is unable to convince the GCPD after Bullock convinces Lee to confirm the accusation. Gordon overpowers Barnes in a duel. The latter is arrested and incarcerated in Arkham. After Isabella's death is announced an accident, Nygma begins investigating it personally and deduces it was murder, suspect Butch; Cobblepot promises to help bring retribution to Butch. Ivy reveals herself to Bruce and Selina, unintentionally causing friction in their relationship. She is revealed to be followed by crossbow-wielding mercenaries seeking to kill her for a necklace she stole. The trio escapes and later finds the necklace's original owner dead; the necklace is revealed to contain a key.
Sources and content license
Source and revision history · Adapted from Wikipedia contributors, Gotham season 3. HTML formatting and reference markers removed. · Content license