The Return

The Return is the thirtyseventh episode of Ben 10.

Plot
A shuttle launch at NASA is interrupted by a purple lightning storm. This attracts the attention of Ben, Gwen, and Grandpa Max, who hope to discover the origin of the alien werewolf and mummy. While at NASA, Ben runs into an ill-tempered scientist by the name of Dr. Vicktor.

Surveillance tapes associate him with the purple lightning storm, and he is quickly shown to be in cahoots with the two creatures. Ben, Gwen, and Grandpa Max encounter the creatures again, in addition to Doctor Vicktor in his true form. Following a losing battle, the Tennysons split up: Grandpa Max and Gwen board the space shuttle that Doctor Vicktor launches, and Ben follows Vicktor as XLR8.

The mummy's on board the space shuttle, and Vicktor sends the werewolf to New Mexico in a flash of purple lightning through use of a teleportation device. But as Ben confronts Dr. Vicktor, the scientist reveals that he is not carrying out his own plan. To Ben's horror, Vicktor revives his master, Zs'Skayr.

Major events

 * Ben and the gang encounter the alien werewolf and mummy again.
 * Ben first encounters Dr. Vicktor.
 * Ben first transforms into Benmummy.
 * Zs'Skayr is revived by Dr. Vicktor.

Debuts

 * Dr. Vicktor

Omnitrix alien debuts

 * Benmummy

Characters

 * Ben Tennyson
 * Max Tennyson
 * Gwen Tennyson

Villains

 * Escaped Prisoners
 * Zs'Skayr
 * Dr. Vicktor
 * Yenaldooshi
 * Mummy

Aliens used

 * Stinkfly (Accidental transformation; selected alien was Fourarms)
 * Benmummy (Accidental transformation; selected alien was Heatblast, first appearance)
 * Cannonbolt (Accidental transformation; selected alien was Fourarms)
 * XLR8

Trivia

 * The trios 36th stop is Cape Canervel(although, it was not an intentional stop. They only went to Cape Canervel because of the purple lightning).
 * Ben had 3 accidental transformations in this episode, meaning that this episode has more accidental transformations than any other episode.