“Lawn Gnome Beach Party of Terror” is the second broadcast episode of the animated television series Phineas and Ferb. In it, stepbrothers Phineas and Ferb construct an elaborate beach complex in order to survive the intense heat wave that has struck their city. Meanwhile, the boys’ pet platypus, Perry, successfully halts the destruction of all the lawn gnomes in the tri-state area by his arch nemesis, Dr. Heinz Doofenshmirtz.

“Lawn Gnome Beach Party of Terror” was written by series co-creators Dan Povenmire and Jeff “Swampy” Marsh, who collaborated with Bobby Gaylor and Martin Olson, and directed by Povenmire. The episode originally aired in the United States as the one of two previews for the series on September 28, 2007, on Disney Channel. Since airing, the episode has received generally positive reviews, especially for the originality of its title. Fan reaction was also favorable, and the featured musical number “Backyard Beach” was voted the number 2 song in the series by viewers during the “Phineas and Ferb’s Musical Cliptastic Countdown” event.