The Doctor spotted the farmer approaching them, and was surprised when it turned out Leander knew the man. In a friendly manner they greeted each other, the older man walking up to the younger man and shaking his hand thoroughly. The Doctor smiled politely, but he knew. He knew that no one could be trusted. And this man wasn't exactly the thinnest of beings. He scrambled for his sonic screwdriver and began to scan the man, knowing that if it was indeed one of them, it wouldn't be able to withstand the sonic for too long. 

The manner to which the farmer reacted and the readings that come from his sonic instantly made the Doctor's hearts lurch. He hadn't expected to come across one so soon. This man, was indeed...a Slitheen. Just as the Doctor was about to retort something to the alien, he menacingly reached towards his forehead, and at that moment, the Doctor jumped in front of Leander, guarding him with a protective arm. The man in front of them began to drag his skin over his head, revealing a green lump that began to ascend from out of the slit. Two large black eyes popped out threateningly and, within seconds, it had ripped it's long neck and shoulders out, the skin beginning to loosen around the chest until it simply dropped from the figure of the now fully exposed Slitheen. The Doctor kept his sonic in hand, watching as the Slitheen discarded the skin like trash. 

"Well hello there...we meet at last, Time Lord!" The Slitheen gurgled, its long clawed fingers snapping menacingly in the air. The Doctor simply stood his ground. 

"So, what is another family of Slitheen doing on planet Earth, ey?" The Doctor asked whilst the huge green creatures fangs began to drip with saliva. "It's against the law for any trading species to integrate with a level five planet, if you have killed people, then you have just committed an illegal act." 

"Our ship crashed here Doctor, we did not intend to kill, we only needed some...nutrients as we plan our big surprise," As soon as the Slitheen sported out 'big surprise'. it covered it's lips humorously. "Oops! Looks like i've said too much!." 

"What are you lot planning? Because what ever it is, I promise you, I will stop you." The Doctor said between gritted teeth. He knew that the Slitheen was getting ready to pounce at any second. 

"Now that I've let my plan slip, I suppose you and that young thing behind you have to die now..." It brandished it's claws towards them, taking one step towards them, ready for the kill. The Doctor knew they only had one chance of escape. 

Taking the Slitheen by surprise, he held up the sonic screwdriver and revved it into action, a loud ear-splitting scream emitting from the small tool. The Slitheen's sensitive ears roared with pain and the alien fell backwards, yelling and gurgling in agony. The Doctor had spotted the farmers house sat across the field. 

"Leander, I want you to run towards the house, you hear me?!"