Miami 7 ( S Club 7 in Miami) S01 E11 ( The Bermuda Triangle) 6, 17, 1999

S Club 7 performs Dancing Queen The S Club 7 want a day off so they borrow Howard s boat and go out into the ocean. They all fall asleep and the boat winds up in the Bermuda Triangle. When they wake up they are in 70 s clothing and when they go to the hotel, it looks like it did in the 70 s as well