- Creepy Child: Billy Underwood.
- Foreshadowing: Doggett's involvement in this case is being driven by his own son's kidnapping and murder.
- Wrong Genre Savvy: Averted. Doggett insists on treating Billy Underwood's reappearance as a standard child kidnapping, even through Scully keeps pointing out the strangeness of the case. Doggett, however, succeeds in resolving the case.