Ben 10: Ultimate Alien Episode 2.07 Creature from Beyond

An old man named George watches TV. In fact, he watches some Forever Knights live. The group of Forever Knights that he is watching tries to open an ancient door.The Knights knew that behind that door it was the secret of the First Knight ever. A Knight named Winston tries to tell them that this is a bad idea, but they don't hear him and becomes an explosion. Old man George runs away from the TV and goes out of his home. The team goes in the place that the Knights were and an other group with leader Sir Cyrus. Gwen finds that in the door was a monster. They find the monster. It's a Limax-like medium size monster. The monster touches Gwen's head and Gwen goes in his mind. A few minutes later, she goes in her mind again. In the end of the fight, the monster takes Winston. Gwen finds that the monster is a Lucubra, a monster from other dimension. They find the Lucubra again, but they don't let Gwen to come if it isn't really emergency. They go in, Ben becomes Armodrillo and the Lucubra attacks to them. Gwen is ready to go in. This moment appears Sir Cyrus with his group. They go in, Ben becomes NRG, he opens a big hole and Gwen does a spell for take Lucubra in his dimension. Lucubra is in his dimension. In the end, Old Man George goes to the door and discovers that the monster isn't in it.