In an episode of "Blue Bloods" titled "Identity," a shocking twist involves identical twins who exchange a secret code leading to one brother shooting the other before killing himself. Viewers took to Twitter to express their surprise, with some stating that it was the most shocking ending they had seen in a long time. However, while the twist was surprising, it ultimately went too far and may have crossed unspoken lines for some viewers. The push for unpredictable moments in TV shows must be balanced with maintaining audience engagement and comfort levels.