- No regrets.—"Serena"
When anxious groom hires Magnum and Higgins to investigate his bride-to-be the day before the wedding, they expect to uncover a simple affair. They are in for a surprise...
Tropes:
- Asshole Victim: Aiden's first wife Rebecca, who hired "Serena" to kill him to avoid a costly divorce, only for her hitwoman to fall in love with him and kill her instead.
- "Serena" claims that most of her victims were people who had it coming.
- Blackmail Backfire: "Serena's" old handler makes a big mistake blackmailing her by threatening to reveal her past as an assassin to her fiancé. She pays him off with money coated in poison.
- Dark and Troubled Past: "Serena" goes through many different stories before the truth comes out: she's a former assassin who fell In Love with the Mark.
- Decoy Backstory: When confronted with evidence that she's living under an assumed identity, "Serena" claims to be hiding from an abusive ex-boyfriend.
- Designated Girl Fight: The teaser has Higgins fighting "Serena," who's in her wedding dress.
- Has a Type: Aiden seems to have a serious weakness for dangerous women. It says something that the hitwoman is the better person of the two.
- Hoist by His Own Petard: Rebecca was killed by the hitwoman she hired to kill her husband.
- How We Got Here: The episode opens with Higgins in a knock-down drag-out with a bride in an upscale hotel room, then jumps back in time to she and Magnum getting the case.
- In Love with the Mark: "Serena" was originally hired by Aiden's first wife to kill him as a cheaper alternative to divorce. However, after watching him for a while she decided he was a much better person than her employer and killed her instead, then left a suitable mourning period before approaching him herself.
- Mistaken for Cheating: Aiden initially hires Magnum and Higgins when he becomes suspicious that she's cheating. The investigation seems to confirm this when the pair follow her to a seedy motel room where she meets a man, until it becomes obvious that she's paying him off.
- Ms. Fanservice: "Serena" is shown in her bra when changing out of her wedding dress.
- Public Secret Message: While being arrested, "Serena" tells Aiden, "No regrets." After her escape from prison, she and Aiden sail off into the sunset together on his yacht, called "No Regrets."
- Wounded Gazelle Gambit: When it's revealed she's been living under a fake identity, "Serena" claims she's on the run from an abusive partner who found her and threatened to ruin her new life unless she paid him off. But when Magnum went to the guy's motel room to make sure he stays away from the wedding, he learns the truth; she's a former assassin, a story that gains credibility when the money she gave him turns out to be coated in poison.
