Singlehanded

Singlehanded is the thirty-third episode of Ben 10: Alien Force.

Plot
While Ben is escaping from Sunder, the Retriever, using Spidermonkey, Sunder's Energy Axe strikes the Omnitrix, teleporting Ben to the Null Void and leaving his Omnitrix hand on Earth. As Ben is running from an insectoid alien, his hand attempts to find Julie, but is caught by a dog instead. The dog's owners take the Omnitrix away and accidentally turn him into Big Chill. Big Chill freezes the Vulpimancers that are chasing him, but they escape. He then changes to Swampfire and forces them to retreat with fire blasts. However, the dog's owners are scared away by the blast.

Ben then turns into Jetray to find Grandpa Max's old Null Void Camp. However, his Jetray hand grabs Julie's leg, causing her to freak out and whack the arm repeatedly. This causes Ben to revert to Human form and fall towards jagged rocks. He is saved by a Null Guardian, who proceeds to slobber on his head. Julie sees the hand, and takes it to Gwen and Kevin. Sunder appears but Gwen and Julie fight it off, and Kevin tries to bring Ben back. Julie accidentally activates Diamondhead, who brings down the bridge Ben is walking on. Ben makes it to The Camp, but finds it overrun by aliens. Kevin brings Ben back (without his left hand, unfortunately), and he uses Brainstorm, Humungousaur and Echo Echo to fight Sunder. Ben's hand reappears, Sunder is sent to the Null Void and then Sunder is attacked by the Havok Beasts.

Characters

 * Ben Tennyson
 * Gwen Tennyson
 * Kevin Levin
 * Julie Yamamoto
 * Null Guardians
 * Havok Beasts

Villains

 * Sunder (first appearance)
 * Wigsilian Org Beast
 * Vulpimancers

Aliens Used

 * Spidermonkey
 * Humungousaur (x2)
 * Big Chill (selected by little boy)
 * Swampfire
 * Jetray
 * Diamondhead (selected by Julie)
 * Goop
 * Brainstorm (selected by Havok Beasts)
 * Echo Echo

Errors

 * When Swampfire was being attacked by a Vulpimancer the side of him is shown white instead of black.
 * When Ben comes back from the Null Void it shows his left side and his hand is there but later the hand is not there.
 * When Ben dodges Sunder, his shoulder stripe is on the wrong shoulder.
 * When the boys activated the Omnitrix's transformation into Swampfire, they simply tapped the faceplate rather than pressing it down. Ben was shown to attempt this in previous episodes, yet nothing worked.
 * When Gwen and Julie come to hug Ben, Julie's the same height as Ben and Gwen.

Trivia

 * Ben's body forcibly reacted to whatever actions his severed hand had performed.
 * Ben's severed hand seemingly having a mind of its own is similar to Thing of the Addams Family.