The Best Episodes of Ben 10: Alien Force

A time experiment in the 1950s sends a bizarre monster to Ben's time. Now Ben, Gwen, and Kevin must team up with Paradox, a time traveling hero, to face off against the unstoppable creature.

Director: Butch Lukic

Writer: James Krieg

Ben goes to the HighBreeds' world in an attempt to stop their attack on Earth.

Director: Butch Lukic

Writer: Dwayne McDuffie

The Omnitrix transports Ben, Gwen, and Kevin to a planet called Primus, which turns out to have been created by Azmuth. They must stop Vilgax from stopping the Omnitrix at its source.

Director: Butch Lukic

Writer: Charlotte Fullerton

Despite being warned by Paradox, Gwen travels back in time to prevent the accident that turned Kevin into a monster from ever happening. Gwen returns to the present only to find that her time traveling caused a series of events that led to Hex ruling the world.

Director: N/A

Writer: Len Uhley

During a battle Ben and an alien commander are teleported to a distant world. They must put their differences aside if they're going to have any chance of finding a way to return to Earth.

Director: Butch Lukic

Writer: Charlotte Fullerton

Ben, Gwen and Kevin gather their allies to counter the threat of the incoming Highbreed fleet. Azmuth reveals a secret about the Omnitrix.

Director: Dan Riba

Writer: Dwayne McDuffie

An alien named Probity seeks help from Ben to stop the on-going war on her home planet.

Director: N/A

Writer: N/A

Zaw-Veenull asks Ben to deliver Prince Tiffin to Jarret in order to keep peace between the two species. Shortly, after their trip in space, the Omnitrix malfunctions and turns Ben into an Appoplexian named Rath who wants to fight anything that breathes.

Director: Dan Riba

Writer: Len Uhley

Albedo has stolen the Ultimatrix from Azmuth and has used it to kidnap Gwen and Kevin. Ben goes to face Albedo and rescue his friends when he quickly discovers that Albedo has been working in conjunction with Vilgax. Ben is defeated by the pair and gives up the Omnitrix to save himself and his friends.

Director: Dan Riba, Butch Lukic

Writer: Dwayne McDuffie

Powerless, Ben goes aboard Vilgax's ship and faces off with Vilgax to stop his invasion of Earth in their final battle. Albedo gives Ben the Ultimatrix and Ben gets his old aliens and their evolved forms.

Director: Dan Riba, Butch Lukic

Writer: Dwayne McDuffie

Ben discovers that the Forever Knights are trading weapons with the DNAliens, while at the same time, Grandpa Max has mysteriously gone missing. He decides to return the Omnitrix on his wrist and go hero once again.

Director: Dan Riba, Butch Lukic

Writer: Dwayne McDuffie

Ben, Gwen, and Kevin follow a lead that takes them to a secret base in the desert. There they hope to find Grandpa Max but instead find a Highbreed spaceship with a giant cannon.

Director: Dan Riba, Butch Lukic

Writer: Dwayne McDuffie

Gwen's older brother, Ken, is suddenly missing. As they look, they encounter a surprise leading to a shocking secret from the DNAliens.

Director: Butch Lukic

Writer: James Krieg

An alien impersonates Ben with hopes of using his Omnitrix to annihilate him.

Director: Butch Lukic

Writer: Joseph Kuhr

After Gwen receives an S.O.S. from Helen, Ben must go into the Null Void to save her and Manny. Once there, he must find The Wrench in order to stop D'Void, who happens to be Ben's old enemy Dr. Animo

Director: Butch Lukic

Writer: James Krieg

A series of earthquakes awakens a HighBreed officer who has been hibernating deep under the earth’s surface. He believes the HighBreed have lost the war and activates a fail safe device that is programmed to destroy. Ben must now work together with Gwen and Kevin not only to save Grandpa Max, but also the world from this "giant" problem.

Director: Butch Lukic

Writer: Adam Beechen

Kevin is beginning to lose all hope that he will someday return to his human self. He then meets a girl who doesn't seem to mind the form he is in. Kevin finds himself under her spell, quite literally, as Charmcaster has come back to exact revenge on Ben and Gwen. Kevin, under Charmcaster's spell, has no choice but to obey his master and destroy Ben and Gwen.

Director: N/A

Writer: Peter David

Vilgax promises Ghostfreak to spring him out of prison as long as he tells him the secrets of the Omnitrix, but when Ghostfreak betrays him and turns his people into his minions, Vilgax comes to Earth and asks for Ben, Gwen and Kevin's help to get rid of Ghostfreak.

Director: Dan Riba

Writer: Nicole Dubuc

Kevin makes a temporary truce with Darkstar to retrieve an artifact that will return them into their former selves.

Director: Butch Lukic

Writer: Len Wein

Ben, Kevin and Gwen come across an alien box that can forms into a robotic version of whatever it sees. It power becomes a liability when the Vreedle brothers decide to take the box for themselves.

Director: N/A

Writer: N/A

While sick, Ben is visited by old friend Tetrax, who demands that Ben hand over Chromastone.

Director: Dan Riba

Writer: Rich Fogel

When Ben and Gwen learn that their grandmother Verdona is an alien being, Verdona insists that Gwen should come along with her to her home planet and improve her abilities. With this, Gwen is faced with a difficult decision between a human and alien life.

Director: Butch Lukic

Writer: Matt Wayne

Kevin asks Gwen to the school dance; Ben fears he's losing control of the Omnitrix.

Director: Dan Riba

Writer: Amy Wolfram

While Ben has a date with Julie, it is soon ruined when an alien named Ship makes trouble at the local fair.

Director: Dan Riba

Writer: Len Uhley

An alien emperor plans to destroy the planet Earth for kidnapping his daughter. In order to save the planet, Ben must uncover the secrets of Alien X.

Director: Butch Lukic

Writer: Matt Wayne