|This article is about a subject whose real name is unknown, and is known only by a title, nickname or alias.|
- "Oh my god. What was I thinking when I bought the geek machine?"
- ―Joyce Summers[src]
"Geek machine" was the nickname given by Joyce Summers to her Cherokee Jeep while under the influence of the drugged Milk Bars. The geek machine had a ding in its hood from Joyce and Rupert Giles' activities. After her death, Buffy Summers was the owner.
- "Welcome to the Hellmouth"
- "When She Was Bad"
- "School Hard" (Only mentioned)
- "Bad Eggs"
- "Becoming, Part Two"
- "Dead Man's Party"
- "Band Candy"