A telepathic alien contacts Hoshi and offers to help Enterprise find the Xindi—as long as she agrees to stay with him.
Tropes in this episode include:
- A Form You Are Comfortable With: Tarquin first appears in Hoshi's mind as a human, a far cry from the Rubber-Forehead Alien that he actually is.
- Anti-Villain: By no means is Tarquin a villain, considering his tragic life. He's also willing to help Archer with the Xindi attack by locating the next location. However, he becomes desperate to make Hoshi stay with him that he tries to trick her by pretending to be Archer and holds the Enterprise hostage.
- Blessed with Suck: Telepathy may be a useful ability, but it's also the reason why Tarquin lives in exile.
- Call-Forward: The episode offers the first real hint of why the Delphic Expanse was never mentioned on the other shows and movies; it'd be an otherwise normal region of space without the spheres.
- Chekhov's Lecture: Tarquin tells Hoshi that his crystal ball amplifies his telepathic powers. When he threatens to destroy Enterprise unless she stays with him, she threatens to destroy the ball, forcing him to relent.
- Continuity Cavalcade: When Hoshi uses Tarquin's telepathic crystal, her mind is flooded with clips from the first two seasons.
- Do Not Adjust Your Set: When Tarquin is first communicating telepathically with Hoshi, all the computer screens around her show images of her own face.
- Foreshadowing: Archer comes to believe that whoever built the spheres did so to create the Delphic Expanse for a larger purpose.
- I Just Want to Be Loved: Tarquin is a telepathic alien who lives in exile and has outlived his wives by a few hundred years.
- I Want My Beloved to Be Happy: Not only does Tarquin let Hoshi go, he then gives her information to help Enterprise find the weapon.
- Pillow Pistol: Hoshi promises to keep a phaser under her pillow while she stays with Tarquin.
- Properly Paranoid: Archer is concerned that Tarquin is motivated by more than altruism. He's right.
- Really 700 Years Old: Tarquin is at least 400 and still going strong.
- The Reveal: The spheres are generating gravimetric energy, and the intersections of these different waves are what's creating the anomalies. T'Pol estimates that there are at least 50 spheres in the Expanse.
- Stockholm Syndrome: Invoked; Tarquin tries to force Hoshi to stay with him, certain that she will love him like his previous wives have done. He was wrong.
- You Have to Believe Me!: Hoshi tries to convince everyone else that something is going on besides simple hallucinations. Fortunately, even though they don't yet know what's really going on, Archer and Malcolm are willing to take precautions.Archer: Post a security detail outside, and assign teams to Engineering and the armory until further notice.
Malcolm: Are you expecting an attack, sir?
Archer: Around here, you never know.
- Your Favorite: Tarquin serves Hoshi some of her favorite foods for her first dinner with him.