163 episodes match Planet 51

Break-Out at Prison Planet! Part 2: A Planet is Hijacked (盗まれた怪獣収容星（後編）, Nusuma reta Kaijū Shūyō Hoshi (Kōhen))

Two bored space tourism guides, Norton and Andrews, are approached by a very elderly woman, Irma Louise Gordon, who offers them a large sum of money to take her on one last trip to Earth. (en.wikipedia.org)

A meeting in a London bus with jewel thief Lady Christina takes a turn for the worst for the Doctor when the bus takes a detour to a desert-like planet, where the deadly Swarm awaits. (imdb)

When the Doctor and Rose become stranded on a planet orbiting a black hole, they find a human expedition crew and their servants, the Ood, being terrorised by the Devil. (imdb)

The TARDIS lands in a petrified forest on an alien planet. Determined to explore, the Doctor leads his companions into the metal city, where they discover the danger of what will become his deadliest enemies, the mutant Daleks. (Originally broadcast in seven parts.)

Finding themselves on the Ood-Sphere planet in the 42nd century, The Doctor and Donna discover the truth over the Ood's willingness to serve humankind. (imdb)

When Bart gets tired of Homer's horrible parenting skills, he enrolled in the "Bigger Brother" program where he's assigned a fantastic role model. (imdb)

The Teenage Mutant Ninja Turtles are going out of this world. Way out! Their arch villain Shredder has concocted two new mutants and a gigantic robot to destroy the turtles. But also, a mysterious, two foot fifth turtle is following the four around. (imdb)

Fry and Leela disguise themselves as robots to find Bender after he fails to return from a delivery to a robot planet, only to learn that he has become a celebrity in a culture which fears humans. (imdb)

Kara helps Hank face his painful past when a White Martian, who wiped out all of the Green Martians from Mars, kidnaps Senator Miranda Crane who is an anti-alien politician. Adam Foster who is Cat's estranged son arrives in National City. (imdb)

In December 1986, a new planet appears in the Solar System which turns out to be a long-lost twin of Earth's named Mondas. Its inhabitants are the Cybermen.

The crew get trapped aboard the Planet Express ship with a horrific alien creature. (imdb)

When the TARDIS malfunctions and the doors open in the time vortex, the travelers and their Ship shrink to the size of insects. When they arrive on Earth, they uncover a murderous plot involving a new insecticide - but how can they stop the crime in their miniaturized condition? (Originally broadcast in three parts.)

The TARDIS is drawn by a mysterious force and lands on the alien planet Vortis. There the Doctor, Ian, Barbara and Vicki find themselves caught up in a war between an evil force known as "The Animus", its ant-like Zarbi allies, and the butterfly-like Menoptra race and their allies the subterranean Optera.

In seeking the second segment of the Key to Time, the TARDIS heads for an icy world but lands on a populated planet that shouldn't be there.

The Doctor and Kimus head to the Bridge to try and rescue Romana, leaving K9 and Mula to search for Pralix.

The Mentiads take the Doctor, Romana and Kimus to a reunion with K9 and Mula, where they set about trying to defeat the Captain's plans.

The Doctor reveals the truth about the real power on Zanak and must try and stop the Captain and Xanxia before Earth becomes their next victim.

The Doctor and his friends are taken into the Mechanoid City but their troubles are far from over...especially when the Daleks launch an attack.

The Doctor and Vicki enlist the aid of the Chumblies to rescue Steven from the Drahvins and then find a way off the planet before its destruction.