Evil Princess Irmaplotz summons forth a cow-like something to bite Dave, thus a month later when the moon is full, Dave turns into a Were-Cow. Oswidge tries to cure him by having something else bite him, and various were-hijinks ensue.
This episode contains examples of:
- Kirk Summation: After Dave turns into a werebeast-version of his uncle, the Title Character gives a summary of Oswidge's character: "Jinkies! I must raid the fridge, eat an entire ham and perform magic incorrectly."
- A very brief one happens after Dave gets bitten by Lula, and after chasing a group of screaming villagers, Dave (as a Were-Lula) exclaims, "Come back! I have to make a sarcastic remark!"
- Our Werebeasts Are Different: Irmaplotz puts a curse on Dave to turn him into a werecow ("It's like a werewolf—same idea, different animal," as Oswidge explains to the others when they express confusion). To turn him back to normal, Dave turns into a bunch of different were-creatures before returning to his old self.
- Fang puts some tuna on Dave (in his werecow-form) to attract cats, which ultimately turns him into a werecat.
- After being turned into a werecat, Oswidge concludes that his nephew needs to be bitten by a human in order to turn him back to normal—when his nieces refuse bite their brother, Oswidge bites Dave himself. But this ends up turning Dave into a Were-Oswidge.
- Dave's eventually bitten by a hamster, an eggbeater (somehow), Lula (his enchanted sword) and a gym teacher.
- He's only turned back to normal when he's tricked into reciting an extremely difficult Tongue Twister, which ultimately leads to Dave biting his tongue, turning him back into his old self.
- Unfortunately, a side-effect of the previous point is that anyone Dave happens to bite turns into a Were-Dave. Case in point: at the end of the episode, Dave accidentally bites Faffy (the family's pet dragon), turning him into a flying Were-Dave.
