The episode "Dunces and Dragons," also known as "Lost in Time," is the sixth episode of the series that takes place in what fictional underwater city?
Dunces and Dragons: "Dunces and Dragons", also known as "Lost in Time", is the sixth episode of the fourth season and the 66th overall episode of the American animated television series "SpongeBob SquarePants". SpongeBob SquarePants:  The series chronicles the adventures and endeavors of the title character and his various friends in the fictional underwater city of Bikini Bottom.
Bikini Bottom