Make Play

As Phineas and Ferb construct a giant jukebox, Candace meets Princess Baldegoon of Druelselstein, who happens to look exactly like her, and they decide to switch lives. Meanwhile, Dr. Doofenshmirtz tries to ruin his brother's "Drueselstein Favorite Son" ceremony by dumping something on it with his claw made of claw machines.

Songs

 * First verse of Do Nothing Day.

Perry's entrance to his lair
Perry uses a jack to go down to his lair.

Evil Jingle
Doofenshmirtz Evil Incorporated!

Background Information

 * This might take place near the end of summer since there are Back to School sales.
 * This episode aired in Latin America as "La Doble" ("The Double") in Latin Spanish. It aired as "Brincando de Princesa" ("Playing Princess") in Brazilian Portuguese. In Germany it aired on December the 10th as "Königlicher Besuch" ("Royal Visit").
 * Carl and Major Monogram both break the fourth wall when Carl replied to Major Monogram that it's a cartoon (since Phineas and Ferb IS a cartoon), and Major Monogram scolds Carl about breaking the fourth wall.

Continuity

 * This marks the second appearance of Jeremy and the Incidentals. ("The Best Lazy Day Ever")
 * The third time we see "two Candaces" ("Split Personality", "Phineas and Ferb's Quantum Boogaloo")
 * When Candace is bored in the throne room, the ticking sound from "Don't Even Blink" is heard. This sound was also heard in "Unfair Science Fair Redux (Another Story)" and "That Sinking Feeling".
 * Third time the word "Doppleganger" is said. ("I, Brobot", "Cheer Up Candace")

Allusions

 * The concept of a commoner and royalty switching places comes from Mark Twain's story The Prince and the Pauper.

Cast

 * Vincent Martella as Phineas
 * Ashley Tisdale as Candace
 * Thomas Sangster as Ferb
 * Caroline Rhea as Mom
 * Mitchel Musso as Jeremy
 * Dan Povenmire as Dr. Doofenshmirtz
 * Jeff "Swampy" Marsh as Major Monogram
 * Richard O'Brien as Dad
 * Dee Bradley Baker as Perry
 * Alyson Stoner as Isabella
 * Kelly Hu as Stacy
 * Olivia Olson as Vanessa
 *  designates a character that did not appear in this episode