145a - Buried in Time
It starts at the Krusty Krab when SpongeBob realizes they're out of tartar sauce, but when he checks the vat, he realizes it's empty and it has been there for 50 years. When Mr. Krabs yells at him to get back to work, SpongeBob explains the situation. Mr. Krabs gets an idea to start a time capsule.
The next scene shows the tartar sauce vat next to a hole with a large stage next to it. A huge line of people are in line to make contributions and Mr. Krabs tells SpongeBob and Squidward to handle them while he sells souvenirs. It shows several people making contributions which Squidward critiques but SpongeBob finds everything amazing. Mr. Krabs sells cheap souvenirs for outrageous prices. Patrick comes to make a donation of his favorite rock. Squidward lets him put the rock in the air but hits the wood behind him, flinging Squidward, SpongeBob, and Patrick into the Time Capsule, trapping them. Mr. Krabs puts a copy of the Krabby Patty formula in the capsule, making Plankton interested.
In the time capsule, the 3 of them imagine what the future would be like until Squidward gets knocked out. Plankton drills into the capsule, hitting shaving cream that sprays Patrick which gives him a beard and Patrick sprays SpongeBob and Squidward. Squidward wakes up, thinking it's been 50 years due to the beard and escapes through the hole Plankton created. The "future" isn't what Squidward wanted, so he goes back to the time capsule shoving the formula into Plankton's mouth on his way back. The episode ends with Plankton constipated with his body shaped like a bottle and Karen calls him "poopsy" and Plankton asks for more prunes.