In the year 2347, when Old Earth is pronounced uninhabitable, the Clarks load their family dog Hobart onto an intergalactic ark called the Dogstar to be transported to New Earth.
Out in space, Glenn, Simone and Gran discover it's not easy finding a lost Dogstar in the battered old Valiant.
Pursued by Bob Santino, the Clark kids crash land the Valiant on an asteroid called Gavin where they meet Gemma, an alien.
Visiting New Earth, the Valiant crew meets Ramon Ridley, the original inventor of the Robog.
The crew of the Valiant become embroiled in a war between two alien races; the Glurgs and the Radnoks.
Bob Santino discovers that Glenn is a Planet Man fan and inserts spyware into a Planet Man add-on which Glenn unwittingly buys.
The Valiant is captured by the robot inhabitants of Ruca, a race that has done away with humans. Ruca now has a king and queen robot and slave robots called drones.
A meteor shower shears off the nose-cone of the Valiant and Boombah floats away. He's captured by Bob Santino.
Lincoln and Glenn are captured by a highly evolved race of dogs, from the planet Sirius II. They walk on their hind legs and speak like human beings.
The Clark kids meet Ramon Ridley again. He says he knows where the Dogstar is and directs them to Old Earth.
When Hobart falls in love with a French Poodle, Zeke tries to prove to Alice that he too can feel such an emotion.
Glenn attends a Planet Man convention and after being chased, escapes with the old actor, Bud Rafferty, who played Planet Man in the TV series. Glenn struggles to understand that Bud is only an actor and not the real Planet Man.
Lincoln invents a matter transporter called a Beambox to send keepsakes to their parents on Old Earth. Touched, Mark and Greta Clark send a few things back, but Bob Santino sneaks in a very nasty surprise of his own.
When Bob finds the Dogstar, the Clarks, thinking quickly, call the media. Bob can't destroy the Dogstar under the scrutiny of TV cameras.
The Valiant lands on planet Ruca again but on this visit the crew have journeyed back in history to a time before the robots rose up to overthrow their masters.
Could Gemma really do the unthinkable and eat Boombah?
Lincoln takes a brain-boosting holiday on the planet Mensa and attracts the attention of a certain Bob Santino.
Hobart, Zeke and Alice come across Chester, a highly evolved yet tiny dog who speaks incessantly.
Dino tries to impress his father, Bob Santino, by taking on the mantle of evilness.
The kids are shocked to discover that Gran has a secret admirer. Glenn is especially shocked because Gran's secret admirer is none other than Bud Rafferty.
Could there really be a whole planet that acts as an advertising agency for the entire universe? And could this planet help the Clarks to locate the Dogstar? Or will the Dogstar remain lost? The answers are yes, no and probably.
It sounds like the perfect toy. Enter a Dreampod, and your wildest dreams come true. Of course, there is a slight drawback; it's a ploy by Bob Santino to distract the Clark kids and get Boombah.
The kids find the Dogstar, but it's been destroyed by meteors. Or so it seems.
A single pink hair is all it takes for Bob Santino to clone Boombah. Problem is the clone, called Barbara, grows to the size of a building and takes Dino as a hostage.
The Dogstar goes through a microwave radiation anomaly and ends up the size of a tennis ball. It arrives at New Earth where, by a stunning coincidence, it ends up inside the very Robog that belongs to Mark and Greta Clark.
Ramon Ridley finishes rejuvenating Old Earth and swears the Valiant crew to secrecy. He gives them a homing device that will attract the Dogstar and to everyone's surprise, it works.