Count Gracula is the 51st episode from Season 1 that aired on July 30, 2000.
A vampire and his pal bat move in the house on the night of Halloween and bites Gorgious who soon bites the others into vampires. Soon after, the vampire tries to bite others with the help of his 6 pals but fails.
This plot is coming up soon.
If you want to see the transcript of this episode, click on to this link.