Arriving back on the harbour, Bucky didn't hesitate to jump over the side and onto the wooden panel. He spotted the black UNIT SUV parked at the entrance of the harbour and three UNIT soldiers ran towards him. With a look of angst and concern on his face, he stopped and greeted them.

'Clara's been taken,' he told them urgently, flapping his hands around like a crazy seal. 'We were out on the ocean and something gross grabbed her and pulled her in. She could be dead for all we know.'

'Clara Oswald, your associate?' one of them asked him.

'She's not my associate, she's my… look, can you please just help me? I'm worried sick.'

'Don't worry son that is why we have this!'

In an instant, the water beside them broke as a large black cylindrical item rose to the surface. UNIT had been embellished on the side of it in white text with the logo on display for everyone to see. A hatch was on the top and a small camera was adjusted to the top.

'Is that a submarine?' he asked in awe.

'It's the very best submarine!' he said. 'I'm Officer Transit. This if Officer Thor and Officer Melrose.'

'Thor?'

'Yes. Is there something wrong with that?'

'Absolutely not. I spoke to Agent Christwell on the phone about an hour ago and he said you'd dispatched a sea vehicle but I didn't think he meant a submarine.'

Climbing on top of it, Melrose with her blonde hair and blue eyes, opened the hatch and a loud squeaky noise was heard around the harbour. She slid down into the interior which was black with white pulsating lights. Sonar equipment was fixed onto the front of the submarine with a large screen showing what the camera saw. At that moment, it showed the surface of the ocean with the grey sky in the distance.

'Get in!' ordered Transit politely as he too slid down inside.

Obediently, Bucky jumped inside the submarine and looked around.

'Agent Barnes,' said Officer Thor. 'Scoot over please.'

He moved out of the way while the bulky man jumped down inside and closed the hatch, making sure it wasn't open.

'Commencing subduction now.'

The submarine made an unusual whirling noise as it sank beneath the waves and Bucky looked at the screen and studied the Blackpool Sea and its filthy colour. The sonar sound gave an eerie feel to the place and Bucky stood eagerly, hoping he would find some answers.

An hour later and they were travelling along the ocean bed, staring out at the school of fish that swam past the camera.

'There's nothing obscure yet,' suggested Melrose as she rose to get a bottle of water from the red mini fridge.

'Reminds me of that book I read last week,' said Bucky. '20,000 Leagues or something.'

'What the hell is that?'

Bucky's suspicious were instantly aroused and he walked over to the sonar equipment and stared at the camera. In the distance, there was domed infrastructure but the water made it almost impossible to see. It seemed black in colour and Transit moved the submarine closer until they were about twenty feet away.

'It looks like some form of… sea base,' suggested Thor as they sat and observed it. It was quite large.

'Well what's a sea base doing in the oceans of Blackpool?' Bucky sounded bamboozled. 'Do scientists occupy this area?'

'No they don't,' Transit rose and realised it was unsafe to approach it any further. 'If you look to the right, you can see a door and hatch. My guess is that that is the way inside. We need to go to the hatch, open it and see if Clara Oswald is still alive. Maybe it's all connected to the missing people.'

'And how do we get inside?' Bucky became a little frustrated. 'We're not semi-aquatic. We can't swim and breathe in water.'

Rolling his eyes at the man's pessimism and doubt, he strolled over to a large white door and spun the handle. Opening it, Bucky saw ten diving suits on hangers. They all looked a little old and they were dark orange. A large beige cylindrical helmet accompanied them and they smelled a little musty.

'You want me to get in that?'

'Officer Thor can stay here while me, you and Melrose see what's going on in there. We need someone on board in case something happens and we need to alert UNIT.'

The very thought of being so alone at the bottom of the ocean terrified all four of them. If something were to happen, they would not be receiving assistance anytime soon.

'Well I'm taking her leather jacket,' he said. 'She might want it.'