In the fourth series, there were also recurring sketches of a quiz show named Find that Fraction hosted by Colin Cool (played by Simon Davies who co-wrote the second to fourth series with director Neil Ben and had played the King of Diamonds in all four Table Mountain series), and a sports show named Sports Stand hosted by Sue Harker (a spoof of Sue Barker, who was played by Liz Anson) and Harry Fraction (a spoof of Harry Gration, who was also played by Simon Davies), along with a supervillain named The Diddler who Maths Man had to solve mathematical problems caused by when he ventured down to Earth (in the final episode, she was revealed to actually be Her Wholeness in disguise).

In the sixth series, the Superhero School gained an on-board computer named VERA (whose initials stood for "Voice-Enhanced Resource Activator", and was voiced by Su Douglas who also played the Queen of Spades in the fourth series) and a character named 2D3D who appeared in his virtual reality glasses (Maths Man now also spoke directly to the audience when he ventured down to Earth calling them his "Maths Team", and His Wholeness set a puzzle for them at the end of each episode).

In the seventh and final series, the episodes were shortened from twenty minutes to fifteen, and again featured Maths Man getting sent down to Earth to solve mathematical problems in everyday life.

The two gargoyles, Gar (male) and Goyle (female), also made observations on the mathematical happenings in the castle then summarised what its residents learned near the end of each episode (the week's table would also be displayed on the portcullis as it lowered), and the castle pets, Brimstone the dragon and Digit the kitten (who were drawn by Bevanfield Films in this series), had their own adventures below stairs in the cellar.

This series was originally aired on Mondays as part of the BBC's schools programmes strand, then entitled Daytime on Two, at 9:40am.

The Jack of Clubs and the 5 cards must sow 20 sunflower seeds in equal rows, and the Queen of Spades in the counting house with the help of the Jackie of Diamonds works out the wages.

The Queen of Diamonds in the counting house with the help of the Jack of Hearts works out from the Ace of Clubs how much the silver buttons on the Kings' new waistcoats are going to cost.

The King of Hearts in the counting house with the help of the Jackie of Spades works out how much the number cards raised in the courtyard sale.

So in the end, the King of Spades decides to keep the table banner, Old Mathematical's and the multiplication square and sell the Times Machine.

The Ace Mechanic of Spades fixes the Times Machine for the King of Hearts and he uses it to multiply for the 3 cards 420 by 4 packed lunches.

The fourth series, which was produced in 1999, comprised five episodes focusing on fractions and decimals (and was the first to be set at the Superhero School space station).

The trainee superhero, Maths Man (played by Craig Heaney), was guided by his mathematical tutor Her Wholeness (played by Kim Vithana), with recurring sketches of quiz show Find that Fraction with Colin Cool and sports show Sports Stand with Sue Harker and Harry Fraction.

Maths Man (now played by Paul Vates), was now guided by a new mathematical tutor His Wholeness (played by Clive Perrott), and aided by Superhero School's new on-board computer VERA whose initials were an acronym for "Voice-Enhanced Resource Activator", along with a character named 2D3D who appeared in his virtual reality glasses.