The TV Series
- Cargo Ship: Wynonna really, really loves her motorcycle.
- Complete Monster: Jack of Blades is the last of the Seven and the nastiest Revenant in the series. A Serial Killer who killed multiple women before being put down by Wyatt Earp, Jack celebrates his return by murdering a woman on the side of the road, then promptly sets about killing whoever he can while corrupting a young doctor by convincing him that rearranging patients' organs can cure them of diseases, while Jack sits back and watches the carnage. Disposing of his erstwhile student, Jack attempts to vivisect Wynonna herself before being defeated. At the end, Jack proceeds to gloat she had succeeded where all of Scotland Yard failed: defeating Jack the Ripper himself.
- Ensemble Darkhorse: The Blacksmith (a white-magic user who appears in two episodes before dying) and Chrissy Nedley (the only friend of Waverly's who seems to actually be worth the label).
- Officer Haught qualifies as well, appearing in nine of the thirteen season one episodes but only having anything resembling significant screentime in three of them (7, 9, and 12). She even became a Canon Immigrant to the IDW comics.
- Ho Yay: Henry and Wyatt. Probably not a reading intended by the writers, but the Stone Witch ruined their relationship and tortured Henry for over a hundred years by throwing him down a well simply because he was what Wyatt "loved most". And the first thing Henry himself says regarding Wyatt is that the fact that "Doc Holiday" once had Peacemaker engraved with Wyatt's initials as a gift must mean that "he was soft on Wyatt". Plus, Henry is remarkably cool with an old acquaintance of his having a boyfriend, considering the time period he comes from and that he hasn't yet had time to adapt to the 21st century. And that little story he told about once happily bedding a prostitute despite her having a "tail that wasn't wagging" could be interpreted in several ways...
- Les Yay: There actually is some between Nicole and Wynonna, due to their scenes in Walking After Midnight.
- Nightmare Fuel:
- The Revenants. The fact that they take on an outwardly human appearance until they reveal just how much Hell has changed them.
- Bethany's surgery in "Two Faced Jack". Her entire body is cut open, revealing all of her organs as they're removed. The sequence, though short, is skin-crawling, admittedly helped by an amazing practical effect.
- Narm: A lot of the drama in the two flashback scenes involving Wyatt and Doc's last two meetings gets shot down by the actor playing Wyatt's incredibly thick Canadian accent. For the record, the real Wyatt was born and raised in the American Midwest.
- Portmanteau Couple Name: The fandom has two; Wayhaught for Waverly and Nicole, and Wynaught for Wynonna and Nicole.
- Shocking Swerve: It's gotten to the point where one is happening every 5 minutes.
- Special Effects Failure: Tucker Gardner's frostbite looks just painted on.
The Comic book
- Anti-Climax Boss: At the end of the "Home on the Strange" arc, Wynonna is confronted by the "him" who even the other immortal Cowboys are afraid of — Johnny Ringo. It's set up to be an epic fight, but then Wyatt's ghost distracts Ringo, giving Wynonna a chance to shoot him in the back.
- Evil Is Sexy: Dr. Sasha Tarasov.