When a sinister-looking man gets George into trouble with the police, the Secret Seven are outraged. Spying on him, the gang are certain he's bad news. But what exactly is he up to? They need to investigate, and solve the mystert once and for all.
In this, their first adventure, the seven super-sleuths are on the trail of some very strange clues. Jack hears strange noises outside his house, and then he discovers a spooky old caravan. The Secret Seven are determined to find out what's going on, and their curiosity leads them, in disguise, through the snow, to an old house, and an exciting mystery ..
When a priceless necklace goes missing the Secret Seven are first off the mark to catch a thief! Why? Because they saw him making his escape! Now all they have to do is find the necklace...
The Secret Seven have a new meeting place - a treehouse! But someone else is using it too. The gang are furious, but then they learn the intruder is in big trouble, and needs their help. Can the Seven come to the rescue?
Is something mysterious happening at Tigger's Barn? Peter thinks it's a hoax. Then Jack overhears an extraordinary conversation which lead the Seven on a trail of adventure!
Peter and Janet are the only one witnesses when a car is stolen. They saw the thieves, and now all the Secret Seven are involved. Byt when they realise they are on the trail of a dangerous gang, the Seven don't fell quite so brave. This time, they might have taken on too much.
The Secret Seven have a brand-new meeting place, but somebody else has been using it at night. With the helo of a special addition to the gang, the Seven are determined to catch the cheeky intruder, whatever it takes...
When Peter and Jack go looking for their lost model aeroplane in an old abandoned house, they find a surprise. Who is living there, and why? Looks like the Secret Seven have another interesting case to solve...
A girl has mysteriously run away from home, and her parents are frantic with worry. Can the Secret Seven follow the clues and catch up with the girl - or will Susie, Jack's troublesome little sister, get in the way?
The gang witness the horror of a house going up in flames! Then there's the theft of a very valuable violin. Are the two events connected?