And so after a quick call to Alex's mum, the girls were back in the jet and found themselves on their way to Doctor Tracy's lab in Paris. Within a couple of hours, they had arrived and after engaging the plane's autopilot, they leapt out through the hatch of the still-flying jet and parachuted down to the city streets on the ground below.

"Hey, if we can get this sorted out real quick, maybe we'll have some time to shop till we drop," suggested Clover, ecstatic at being back in one of the girls' all-time favourite cities.

"Uh, let's stay focused on catching the bad guy first, then we'll have time to look around," suggested Sam resolutely as they landed on the pavement, bundled up the parachutes and reactivated the instant outfit function on their compowders. Now back in their everyday clothes, they briskly made their way over to Liz Tracy's flat just along the street. They had only been walking for a couple of minutes when they had arrived at the front door, whereupon Sam pressed the doorbell, which gave a somewhat cheerful ring. After a few seconds, the door opened and the girls found themselves facing an attractive woman in her mid-thirties, outfitted in a blue dress and a white lab coat.

"Oh hello. Can I help you?" she asked with a cheery smile.

"Hi there, Doc Tracy, I'm Alex," replied Alex with a wave of her hand. "You may remember my parents from…"

"Oh yes, I recognise you from your parent's family photos," cut across Liz. "Your mother did ring me an hour ago, said that there was something quite urgent that you and your friends needed to see me about."

"Urgent is an understatement," said Sam, holding out a photocopy of the list that they had found. "We've, err, heard from the authorities that someone is targeting major scientists and it looks like you're next on their attack list!"

Liz looked at the half-crossed out list in shock. "Oh goodness, that doesn't sound nice! I recognise some of these names. We all used to be on the same board of governors for the molecular biology division of the International Council For Science."

"Do you have any idea who might be out to get you?" asked Clover.

"I can give you a pretty long list!" answered Liz. "There have been a number of people over the years whom we've had to dismiss from the board on ethical grounds. I guess it's possible that one of them could be out there looking for revenge."

"Always with the revenge," sighed Alex wearily. It was a hardly original motive, as almost every villain the girls had ever encountered over the years was out for some form of revenge on somebody.

"Well, perhaps we best get indoors and discuss this in more detail," suggested Sam seriously. "For all we know, the guy behind all this could be on his way here right now."

No sooner had Sam finished her sentence, than a beam of green light suddenly struck the side of the doorframe, just an inch away from Liz's head!

"Hey, look out!" cried out Clover as she grabbed the started doctor and pulled her into the apartment, away from the line of fire. While Clover got Liz to take cover behind the nearest table inside, Sam and Alex were already dashing onto the street, searching for their mystery assailant.

"There he is!" shouted Sam, pointing to the rooftops. Sure enough, they could see the same man in a hat and coat that Parsons had described, running across the tops of the street buildings.

"Well what are we waiting for?" said Alex. "Let's go and get him!"

Activating the powerful springs in their Trampoline Heels, the girls bounced straight up from the streets and onto the high rooftops, landing right in front of the fleeing baddie.

"Hold it right there, mister!" shouted Sam. "You've got some 'splaining to do!"

Incensed, the man quickly turned back on his heels and ran in the other direction, towards a nearby fire escape. Alex immediately activated her Trampoline Heels again and leapt straight after the man. Just as it looked like she was about to land and grab him, the man suddenly pulled off his coat and threw it right at Alex's face.

"Hey, who turned out the lights?" yelled Alex as the coat clouded her vision. Losing her balance, she crashed straight into some washing lines and got tangled up in a variety of clothes and large bed sheets.

Realising that it was all up to her, Sam gave chase and soon caught up with the panting villain, who was considerably slower than she was, just as he was about to reach the fire escape.

"You don't get away from us that easily, pal!" smirked Sam, reaching out to grab the man by the arm.

Suddenly the man whirled again and Sam realised with horror that he was still holding his weird ray gun, which he was now aiming directly at her! Before Sam even had a chance to leap clear, the man pulled the trigger and the energy beam fired out and engulfed her. A disorienting wave of dizziness engulfed Sam's senses and she was dimly aware that she seemed to be getting smaller. Then everything went dark.

As Alex finally managed to untangle herself from the damp washing that had broken her fall, she saw two things that made her eyes widen in shock. Firstly, the bad guy had gone, having apparently managed to reach the fire escape and dash down to freedom. Secondly, Sam's clothes were lying lifeless in an untidy pile on the roof, with the redheaded girl herself nowhere to be seen.

"Oh no, Sam!" Alex immediately rushed over to where her friend had been just seconds ago. To her amazement, she could see a small shape moving about beneath Sam's shirt.

"Alex, is that you? I'm kinda stuck in here," came a muffled, but familiar voice from the strange shape that was moving beneath the mass of clothes.

Alex let out a sigh of relief as she recognised Sam's voice. "Yeah, Sammy, it's me. Hang on, let me get you out of there." She began to sort through the clothes in order to try and fish her friend out.

"That creep fired his ray-thing at me," explained Sam, still feeling somewhat disoriented from the experience. "It must have caused me to shrink down in size."

"Err, I think it did way worse than that, Sam," gulped Alex as she lifted the shirt clear off the moving shape beneath, her eyes widening once again in astonishment as she saw what precisely that laser beam had done to her friend.

"Why? What's happened?" asked Sam nervously, apprehensive of what Alex was about to say.

"You remember that film we were about to watch?" said Alex slowly, trying to break the news as gently as she could. "Well, I'm afraid you're living it."

Alex held out the mirror in her compowder and Sam's jaw dropped at the sight of her own reflection staring back at her in disbelief.

"What! I'm a frog!" she exclaimed, looking down at her now green-skinned and mucus-covered body. "Oh no, this cannot be happening!"