The captain of the Paradox, who is determined to find Lavender Castle with the help of his crew.
- The Captain: Duh.
- Catchphrase: "Full steam ahead, then!"
- Cool Old Guy: He's not afraid to get involved in battles with Dr Agon.
- Determinator: Determined to find Lavender Castle.
- Eyes Do Not Belong There: He has a third eye on his nose.
- The Klutz: Subverted; he was formerly this until his previous encounter with Lavender Castle.
- Punny Name: His name is due to his third eye.
- Senior Sleep Cycle: Occasionally does this, prompting Sir Squeakalot to wake him.
- Team Dad: The crew of the Paradox look up to him as a sort of grandfather.
Captain Thrice's walking stick, who was given life on Captain Thrice's previous encounter with Lavender Castle.
The Scottish engineer of the Paradox who devotes his time in-between maintaining the Paradox's MD-646 engine and battling Dr Agon with building inventions that don't seem to work.
- Affectionate Nickname: Calls Roger "Rog".
- Berserk Button: He can get very angry if you call him "Big Nose". The Guardian found this out the hard way.
- Brave Scot: In the episode "Raiders of the Planet Zark", he managed to kill The Guardian by hitting him with his long tail, causing The Guardian's gun to fly off him and hit a lever which causes a rock to fall on The Guardian and flatten him. That really did take guts.
- Bungling Inventor: He can maintain the MD-646 engine very well, but his invention skills are as bad as Sir Squeakalot's cooking.
- Catchphrase: "Maximum power coming right up!"
- This catchphrase is subverted in the episode "High Moon", where he says "We've already got maximum power!"
- Companion Cube: He sometimes refers to the MD-646 engine as his "baby".
- Dreadful Musician: He claims to be good on the bagpipes, but he really isn't.
- The Engineer: His duty on board the Paradox.
- True Companions: With Roger.
The Australian pilot of the Paradox who was formerly a Starfighter pilot and delivery pilot before he was captured by Short Fred Ledd.
- Ace Pilot: He can dodge in and out of asteroids if there ever is any in the Paradox's path.
- Affectionate Nickname: Calls Isambard "Izzy".
- Awesome Aussie: In the final episode, "Supernova", he destroyed the Dark Station with just one blast from his ray gun.
- Catchphrase: "Ripper!"
- "Oh, struth!"
- Delivery Guy: Was formerly one before he was captured by Short Fred Ledd along with Lyca.
- Hopeless Suitor: He couldn't ask Lyca out for a date if he tried.
- Ray Gun: Carries this around.
- True Companions: With Isambard.
- What the Hell Is That Accent?: The episode "Lost in Space" shows that he isn't very good at imitating Isambard's Scottish accent.
The Floran biologist and doctor of the Paradox, who was Roger's last passenger before she and Roger were captured by Short Fred Ledd.
- Action Girl: Is always ready for action, especially when Dr Agon attacks.
- Badass Adorable: In the episode "Wearizy", she held Dr Agon at gunpoint with his gun.
- Big Sister Instinct: Has this towards Sproggle.
- Cape Wings: She has these.
- Catchphrase: "Eureka!"
- The Medic: Has taken care of Captain Thrice twice, once when he was badly injured in an attack by Dr Agon, and the other time when he contracted Galactic fever.
The robotic servant of the Paradox, who was formerly the ship's robot on board the Queen Zarla 3.
- Catchphrase: "Ooh, 'eck!"
- Cool Sword: Has one of these, which he once used to defeat the Guardian on the Paradox crew's first encounter with him, as well as Colonel Clump.
- Jet Pack: Is equipped with this, although he isn't very good at flying it.
- Lethal Chef: To the point where he once broke down after Roger and Isambard refused lunch.
- Neat Freak: Likes to keep everything as it should be on the Paradox.
- Pre Ass Kicking One Liner: He gets one in the episode "The Twilight Tower".I don't think so. You see, I don't watch television!
The navigator of the Paradox, who was formerly the navigator on board Short Fred Ledd's ship, the Cutting Snark.
- Catchphrase: "What do I see? I see..."
- Conveniently an Orphan: He is often referred to as an orphan.
- No Sense of Direction: He can't tell his left from his right, which often leads the Paradox crew into all sorts of adventures.
- Prone to Tears: Often cries after an attack by Dr Agon.
- Third-Person Person: Usually does this.
Sproggle's invisible pet Terrian, who was given to him by Twaddle Duff as a birthday present.
- Beware the Nice Ones: He's normally a friendly dog around Sproggle, but when Dr Agon attacks, he turns from a Terrian into a Doberoid and attacks Dr Agon back.
- Canine Companion: He follows Sproggle around wherever he goes.
- Heroic Dog: In the episode "Raiders of the Planet Zark", he saved Sproggle from a trap by chewing through it.
- Invisibility: He comes from a planet where everything and the planet itself is invisible.
- Punny Name: His name is a pun on the phrase "Where is he?".
The Paradox crew's main enemy, who wants the universe to become a dark and lonely place by destroying Lavender Castle.
- Catchphrase: "Fan-incredibly-tastic!"
- Dirty Coward: Although he is the definition of pure evil, he can sometimes be this if he's in extreme danger.
- Evil Sounds Deep: His voice sounds like this, except in the episode "The Galacternet", where Jimmy Hibbert slipped up and voiced him in his Sir Oswald the Merciless voice from Sooty's Amazing Adventures.
- Instrument of Murder: Occasionally uses a laser trumpet if his ray gun is out of action.
- Large Ham: Has moments of this, especially in the first episode.
- Master of Disguise: His neck pendant has the ability to change him into anyone and anything.
- Punny Name: His name is a pun on "dragon".
- Ray Gun: Uses this most of the time.
- Star Killing: He does this as he hates the light.
- Villainous Breakdown: In the final episode, his pet falcon Trump foiled his plan to destroy Lavender Castle, which in turn caused Dr Agon to become really mad and attempt to kill Trump and the Paradox crew.
Dr Agon's pet falcon, who is often the foil in his plans.
- Blowing a Raspberry: Does this when he is confronted with a plan that could involve killing him.
- Catchphrase: "Of course, Master!"
- HeelFace Turn: In Series 2, he begins showing signs of this, because he starts to become a bit skeptical about being Dr. Agon's foil. For example, in the episode "Cloud of Chaos", he says "No! No, don't do it!" to Dr Agon when he decides to kill Isambard and Sproggle. He finally does this in the last episode when he joins the Paradox crew after he foils Dr Agon's plan to destroy Lavender Castle.
- Incredibly Obvious Bug: Has one of these attached to his claws.
- Talking Animal: He has the ability to talk, though it is unknown how he is able to do so.
The captain of the Cutting Snark, who once captured Roger, Lyca, Sir Squeakalot and Sproggle before they were rescued by Captain Thrice.
- The Alcoholic: Has a fondness for rum.
- Black Market: He's secretly in trade with Doodlebug.
- Catchphrase: "Scuttle me bones!"
- Gluttonous Pig: Justified, as he is a pig.
- My Nayme Is: He's a very bad speller, as demonstrated in the episode "Brightonia on Sea", where he can't spell "atrocious".
- Space Pirate: He's good at attacking ships, and he owns a ship as well. He's even dressed like one!
- Tripod Terror: He has an additional leg which he uses to grab victims with.
Short Fred Ledd's robotic parrot, who has a tendency to repeat whatever her master says.
- Catchphrase: "Pieces of five!"
- Mind Probe: She has the ability to brainwash robots and people by firing a blood red beam towards them.
- Pirate Parrot: Except she's robotic.
- The Quiet One: She only talks in three episodes: "The Black Swat", "Brightonia on Sea" and "Traitor"
- Red Eyes, Take Warning: She has completely blood red eyes and black pupils.
The guardian of the Twilight Tower and the Lavender Compass which the Paradox crew need to find Lavender Castle.
- Catchphrase: "Perfect..."
- Flaying Alive: Has done this in the past, as explained by the skulls in his Twilight Tower's dungeon.
- Gentleman Thief: He has a fondness for stealing jewellery.
- Hypnotic Eyes: Not on him, but on his TV which he calls "The Most Fabulous Object In The Universe".
- Made of Iron: At least until Isambard killed him.
- Ray Gun: Carries this around.
- Squashed Flat: Had this done to him by Isambard in "Raiders of the Planet Zark", killing him.
One of a species on the planet Quagmire, also called Danks and who all look alike, except this Dank has a penchant for playing the banjo.
- The Alcoholic: He has a fondness for a drink called "Dank Juice", which is unique to the planet Quagmire.
- Catchphrase: "Don't you go tryin' to escape!"
- Deep South: He evokes several stereotypes of this.
- Spring Jump: He can do this, as shown in the episode "Swamp Fever", when he was chasing Sproggle and Lyca.
- Sore Loser: Clearly, he does not like it when his Banjometer is blown up.
An android who was made at the same factory as Sir Squeakalot, but his circuits have been scrambled and caused his ambition to create the ultimate living museum, and all he needs to complete it are the crew of the Paradox.
- Blind Without 'Em: His infrared eyes mean that he can't see any robots, like Sir Squeakalot.
- Catchphrase: "Excellent!"
- The Paralyser: He paralyses his specimens with his stun guns.
- Super Senses: He might not be able to see, but he has excellent hearing.
- Living Doll Collector: Justified as his nickname is "The Collector".
A pair of twins who run a junkyard that the Paradox crew sometimes visit in order to get spare parts.
- Always Identical Twins: Except Twaddle Duff has a hat on his head.
- Arms Dealer: They are always on the lookout for a deal, even if it is shady.
- Briefcase Full of Money: They are easily bribed by Dr Agon, even though he isn't allowed in their junkyard.
- Catchphrase: "Morning/Afternoon/Evening, squire/squiress! Dim/Duff's the name and rocket engines are my game!"
- Star Fish Aliens: They may look relatively humanoid, but they only have one leg each, and they have tails that each end in a third hand.
- New Job as the Plot Demands: Twaddle Duff once ran a ghost train in the episode "Galactic Park", but it was really Dr Agon in disguise.
The owner of the local supermarket that the Paradox crew sometimes visit to get food for their kitchen.
- Asian Store-Owner: He speaks with an Asian accent.
- Big Creepy Crawly: Well, he is called Doodlebug.
- Catchphrase: "Welcome to Doodlebug's Supermarket, for all your intergalactic needs! How can I help you?"
- Human Popsicle: Was this once when he was paralysed by Colonel Clump.
- We Sell Everything: His supermarket sells turbo gauges, sprocket ratchets, microscope lenses, WD 60 oil, Galactic Jellies, Swizzle Drops, Nebular Chocolates, cans of Jumbo Beans, cans of Ledd's Grog, Lavender Compasses, nomelberries, robotic parrots, Moon worm eggs and chips note , among other things.