When Sarah went into the UNIT headquarters she found it completely empty. Only in the laboratory she saw the Doctor talking with Heather.
"Doctor what is she doing here?" the girl asked.
"Heather has told me that you are harassing her boyfriend."
"I have not harassed anyone," she defended.
"I told you to stay away from them," continued the Doctor.
"You don't have anything to worry about. He hates me."
"Really?" Heather asked. "Does the Doctor hate his dear companion? Wonderful."
"What's going on here? Who are you?" Sarah asked when she heard Heather calling Tom 'the Doctor'.
"We had planned to kill first the Doctor tomorrow and then to you, but since we are here and your Doctor is not going to save you this time we will reverse the order," said Heather.
And then the fake Doctor grabbed Sarah's neck with his hands and began to strangle her. Sarah tried to scream for help, but she could not. The Doctor was too strong and there was no one there to help her.
"Sarah!"
Tom went into the lab and saw the Doctor trying to strangle who it was supposed was his companion. Without hesitation the man attacked the Doctor, who let go of the journalist to give back the attack to the teacher.
"Sarah ... Heather! What happens here? What's this all about?" Murray asked while he defended himself the attacks of the fake Doctor.
"Tom ... trust me ... he is not the Doctor ... It's you," Sarah said, speaking with difficulty.
"Get up stupid girl. You are going to see how the Doctor kills the Doctor." Heather raised Sarah from the floor and made her watch the fight scene that was taking place in the laboratory.
Tom defended himself of his attacker as he could, managing to put him in trouble on more than one occasion. Fortunately he was a young man, big and strong and knew how to defend himself against a physical attack, but he was not an expert fighter, while the Doctor had much experience in combating all forms of alien creatures. A mere human was no match for him ... for the Doctor ... Sarah had said that he was the Doctor and he should trust her. The fake Doctor got knock Tom, who finished lying face up on the floor.
