Double Doomsday

"Double Doomsday" is the seventh episode in the Sonic Boom television series. It aired on 29 November 2014.

Synopsis
Dr. Eggman hires an intern who turns out to be a bit unstable. He commandeers Eggman's doomsday device and is going to set it off. Not to be outdone, Eggman begins building a competing doomsday device. Sonic and Tails step in to avoid disaster.

Characters

 * Sonic the Hedgehog
 * Miles "Tails" Prower
 * Amy Rose
 * Dr. Eggman
 * Orbot
 * Cubot
 * Dave
 * Mayor Fink (cameo)
 * Fastidious Beaver (cameo)

Plot
In the village, Sonic and Amy are visiting Meh Burgers to have lunch. When they reach the register however, Dr. Eggman cuts in front of them, claiming the place. Despite Sonic's disagreement, the cashier, Dave, agree with Eggman. As such, Sonic and Amy have their lunch served much later (and poorly), much to Eggman's gloating. While eating, Eggman is met by Dave who tells the doctor that he is a big fan of his. Eggman takes a liking to Dave and offers him to become his unpaid intern, which Dave considers a big honor.

Taking his eager intern to his lair, Dr. Eggman's lair, Eggman assigns Dave to cleaning the toilets as he first job, which he gladly accepts. Orbot and Cubot however, are worried that Dave's enthusiasm of the smallest tasks will make them look bad, not knowing that Dave are secretly listening in on their complains. Soon after, Cubot goes missing, and Orbot goes looking for him, only to find his companion in pieces. Meanwhile, as Eggman observes Dave's work, the latter finds the doctor's unfinished doomsday device, capable of undoing the existence of earth which Eggman's tells him about. Orbot then arrives with Cubot's pieces, but Eggman is not interested and sends them away while raising Dave's status from intern to protégée.

At Tails' house, Sonic and Tails are testing the latter's newest invention, the Reverse-polariser, a device capable of reversing any force, on the toilet when Orbot shows up on their doorstep and asks them to reassemble Cubot. Back at Eggman's lair, Eggman is assigning Dave more cleaning duties, but Dave is ready for more evil experience. However, Eggman tells him that he would have to wait a few more weeks for that which makes Dave snap from impatience, so he seals himself in Eggman's lab where he finishes Eggman's doomsday device and activates to prove himself an evil genius, much to Eggman's furiousness.

At Tails' house, Tails has finished repairing Cubot who reveals Dave was behind his disassembly. Meanwhile, Eggman, not wanting to be outdone by Dave, builds another doomsday device. Once he activates it though, Tails' computer picks the signal from both doomsday devices in Eggman's lair which Tails recognizes them for what they are. Sonic soon after breaks into Eggman's lair to have Eggman's shut his doomsday device down, but when Eggman reveals they have no off-switch, Tails makes a new plan: if they can make the doomsday devices vibrate at exact opposite frequencies by increasing their power, they should cancel each other out. Tails therefore sneaks in on Dave and convinces him to help him outdo Eggman while Sonic helps Eggman outdo Dave. While Tails and Dave work more seriously however, Sonic is forced to gather power for Eggman by more ridiculous means while assisting him with his lunch.

Eventually, both doomsday devices go off and the forces released by the two devices seem to cancel each other out at first. Instead however, a black hole is formed above Eggman's lair that will erase all existence, which Tails deduces was created from a small difference in power between the doomsday devices (which was due to a battery Sonic left out). To stop the black hole, Tails gives Sonic his Reverse-polarizer so he can reverse the black hole's gravitation pull and make it fall in upon itself. However there is a catch: for it to work, Sonic has to get close enough to the black hole, and if he is too slow, he will trapped within it and the world will end. Regardless, Sonic enters the black hole and despite some difficulties, he manages to destroy the black hole and get out in time. Furious at Dave's actions, Eggman fires him and reassigns Orbot and Cutbot to their regular duties. Returning to Meh Burgers, Dave resumes his old job while swearing revenge.

Trivia

 * This is the first episode in the Sonic Boom television series to be written by three writers.