Hack

Obsession (1x11)

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Olshansky becomes the bodyguard for Abby, a woman terrorized by a stalker that neither she nor anyone else has ever seen. The signature item he leaves is a red rose. After Olshansky and Abby have a tryst, Olshansky tells her it can't continue. The next day, someone shoots at Olshansky -- is it the stalker, or is it Abby, and the stalker is a figment of her imagination?