TWENTY

Alexander's wheels cut channels through the rain as he headed back towards the front of Jackson Leaves, the umbrella wedged behind his shoulder to keep both him and the apparatus dry. If anything, the rain seemed to be getting heavier, bouncing off the road in white sparkles, and flooding the drains, running in great streams along the gutter. Alexander noticed the streetlights begin to flicker as he lined himself up with the drive of Jackson Leaves.

'It's getting worse,' he whispered, his words lost in the clatter of the rain.

Joe and Hannah didn't need him to tell them, though; looking around was clue enough. The privet hedge writhed in front of the house, new growths shooting forth, leaves unfurling into dry then dead, knocked apart by the hammering rain. A season's growth in an instant.

'It's spreading out,' Alexander shouted, pointing at Gloria Banks's house next door. The structure seemed almost fluid, windows fluctuating between shattered holes and bright new glazing, giving the impression that the house was winking at them. Maybe it was pleased at the undulations that were taking place across its surface: cladding surging forth to be sucked back in again by the hungry bricks, clouds of cement dust exploded from the grouting as it moistened then aged. The blue-granite gravel that Gloria had taken such pride in was not serving her well, swirling and spluttering as it was whipped to and fro by the weeds that thrashed within it.

A crack appeared in the pavement just in front of Alexander's wheelchair.

'We need to be quick!' he shouted. 'Joe, fetch a couple of stones – not from there!' Joe had been moving towards Gloria's house. 'Idiot! Behind us. The disruption is less the further one goes from the house.'

Alexander turned on the contraption in his lap and pointed it towards Jackson Leaves. On the PDA screen he could see the swirls and eddies of chronons as the disruption fluctuated over the area.

Joe returned, holding out a pair of stones.

'Right,' said Alexander. 'Let's test this, shall we?'

He took the stones, weighing them gently in his palm as he scrutinised the PDA screen.

'Listen, the two of you,' he shouted. 'With this, I can see the disruption waveforms. They ebb and flow, yes? Like a tide... rippling towards us. If we're quick and precise, I should be able to guide our way, picking the point at which the waveforms are stretched thin and less dangerous... like... there!'

He threw the stone and, instead of disappearing as it had before, his good aim saw it sail through the disruption and break the glass of one of the upstairs windows.

'Aha! What did I tell you?' He threw the other stone and it followed the trajectory of the first, rewarding the three of them with the sound of more glass shattering. 'There is a route through the waveforms, see?'

He looked at them, but what he was saying was so far beyond their understanding of physics it clearly meant nothing. 'Look... just imagine we're on a beach facing the sea, OK? We want to get into the deep water but can't let the crests of the waves touch us as we go in. If they touch us we will die, so we have to jump them. You understand?'

'Like the seaside!' Joe shouted.

'I hate the bloody seaside,' moaned Hannah. 'You always get sand in your...'

'Yes!' Alexander roared. 'Just like the seaside. Now, Joe, you'll have to carry me on your back, the wheelchair will just slow us down.'

'Piggyback ride!' chuckled Joe, dropping down in front of Alexander's wheelchair. Alexander passed the waveform reader to Joe and clambered onto his back, holding the umbrella over both of them to keep the equipment dry.

'Hold the screen right out in front of us,' ordered Alexander, 'but remember it's not waterproof, so keep it under the brolly, yes?'

'Yep!' Joe stood up and gave Alexander a playful bounce. 'This is going to be fun.'

'I sincerely doubt that,' Alexander replied, staring carefully into the screen. 'OK, so we need to take two steps to our right...'

Joe did.

'And then forward four steps on my mark, one... wait for it... two – stick close, Hannah – three... now!'

'I hope the drug does make you do whatever someone says,' said Rob's voice on the speaker. 'If it does... well, that makes this easier.'

'No!' Gwen shouted, knowing only too well what he was about to do. She began kicking violently at the door, her hip and ankle flaring in pain with each blow.

'What do you mean?' asked Julia on the monitor, while Ianto yanked out the drawers in the old dresser, hunting desperately for anything he might use to force the lock.

'I love you, Julia, OK?' Rob promised, as, drawer after drawer, Ianto came up with nothing. 'Forgive me for what I'm about to do.'

Gwen swore. There was no way she could break through – the wood was too thick and she was working against the frame. She couldn't give up though. One last try...

Julia smiled. 'I do.'

Gwen ran at the door, roaring at the top of her voice. Just before she hit it, she vanished, space folding in on itself from the pressure of dimensional intrusion.

In the lounge, Rob sobbed and raised the mallet above his head before bringing it down with all his strength...

Gwen, appearing from the wall by the fireplace, barrelled into him, her momentum sending both of them to the floor.

Rob was quick to recover. He kicked out at Gwen, reaching for the mallet which had gone flying in the scuffle. His foot caught her on the hip, which was sore already from her attempts to break down the door, but she clenched her teeth against the pain and fought to stay close. The last thing she wanted was to give him the space to use his weapon.

Rob grabbed the taped shaft of the mallet, but reaching out had left him open to attack. Gwen utilised every ounce of combat training, following the cardinal rule of punch-ups: there's no such thing as a fair fight. She thumped him hard in the groin and, while he was curling into a ball, got one hand on the mallet. Her other hand found the back of his head, grinding his face into the carpet.

She pushed herself to her feet, yanking the mallet out of his hands and was about to hit him with it when a hand dropped onto her shoulder.

'Don't,' said Jack. 'It's not his fault.'

'OK,' said Alexander. They were now standing on the gravel forecourt of Jackson Leaves. 'That didn't kill us, then. How wonderful.'

'Time to build sandcastles?' asked Joe.

'Maybe later, my boy,' Alexander replied. 'Let's see if any of Jack's lot want to come out to play first, eh?'

Jack unlocked the dining room door to find Ianto standing there with his arms folded.

'When you've all finished being heroic in my absence,' he said, 'I'd quite like to have a go myself.'

'You can start by figuring a way out of the house, then,' said Jack.

'Oh,' Ianto wandered into the hall. 'That hardly seems fair... All Gwen had to do was beat up a workman.'

There was a knock on the door. Ianto turned to look at Gwen and Jack.

'Don't ask me,' said Jack.

Ianto opened the door, and a young man barged past him with Alexander on his back.

'Hello there,' the old man smiled. 'Did someone order a genius?'