Ben 10 Episode 24: Ghostfreaked Out A terrorizing nightmare of Ghostfreak unnerves Ben and also spoils Gwen's tour of an academy she wants to attend. And if that wasn't enough they also have to cope with the antics of Acid Breath, Frightwig, and Thumbskull.

Clip from the Cartoon Network series Ben 10

Clip from the Cartoon Network series Ben 10

Clip from Ben 10 episode 32. Ben and the gang get trapped in a volcano and Ben uses Cannonbolt to take on a terrifying foe.

Ben 10 Episode 23: Ben 10 and the gang ride a jet belonging to Grandpa Max's old Friend, Donovan Grand Smith, who owns an underwater resort. At the entrance, they receive a warm welcome from Donovan himself, though they also meet with his grandson, Edwin, who didn't seem to be excited about their guests. Later, when Edwin, Ben, and Gwen enter the Undersea Manta Ray, a giant submarine, they encounter strange aliens that threatened to destroy the whole resort. While the kids find a way to cooperate with each other to find the source that lures them in, Donovan himself learns a few lessons in how to bond better with his grandson.

Ben 10 Episode 22: Hex's niece, Charmcaster, enters the underground prison he's held at to release him out of his cell. With her help, Hex is able to regain most of his powers after being given his magical staff. Meanwhile, Ben, Gwen, and Grandpa Max head to a magic convention held in Las Vegas. There, Gwen finds the legendary Keystone of Bazell. With it, she gains the powers of Lucky Girl once again, but will it last after finding out that Hex and his niece are after it?

Clip from Ben 10. Ben, Gwen and Granpa arrive in the Bermuda Triangle

In Texas, a group of men discover a mysterious mask belonging to Ah Puch, the Mayan god of death and destruction. The mask is the key to the ultimate weapon in the world, known as the Sword of Ekchuah. However, when Grandpa Max and his grandkids learn that the mask is discovered, he impatiently sets out to obtain the mask, so that it does not fall in the wrong hands. Unfortunately, they find out that Enoch of The Organization is after it as well. The kids worry of how Grandpa Max has become, but with Enoch in the way, will Grandpa Max find the sword before him?

When Ben and Gwen argue over a birthday party to occur in the next few months, Grandpa Max is distracted by their quarreling and almost hits a young boy camper. To ensure the boy's life, they head to Camp Opinicon, only to find no people around. As they investigate the premises, they find twins, whom were also hiding from something that may have a connection to the lifeless camp. Grandpa Max readies to leave the area with the children, only to find that the RV's engine is clogged with a mysterious fungus. While the kids take in shelter in a nearby cabin, Grandpa Max is captured. Now Ben must come to the rescue to discover a new alien form, as well as a way to destroy the evil alien Myceloid Monsters and their Fungal Master, and learn the benefits of what sharing can do.

Clip from Ben 10 in which Ben 10 meets his hero Kangaroo Commando