Martha looked at him.
"Doctor Who?" asked Martha.
The Doctor explained to Martha.
"Why are you telling me all this?" she said, confused.
"Like I said, I trust you." the Doctor replied.
"How can I believe all this stuff you are telling me?" said Martha, she started picking her bags up.
The Doctor got to them before her.
"Let me show you something." he said, as he started walking away carrying Martha's bag.
She looked at him walking away. This was too much for her to take in at the moment. She picked up the other bag and she followed him.
They came to a stop by a blue police box.
"There you go." The Doctor said, grinning.
"It's a police box." she said.
"Well, yes. But this isn't just any old police box." He walked over to it and opened the door.
"Come in." he said, holding the door open for her.
"What do you mean come in? There isn't much room in there at all." He was still waiting for her. So she walked over and had the surprise of her life.

"You look surprised." The Doctor said, seeing the look on her face.
"How the ……?" "Heard the saying, never judge a book by its cover"
"Yes, but?" Martha said.
"This is my TARDIS." The Doctor said.
"Your what?" she asked.
TARDIS, otherwise known as Time And Relative Dimension In Space. In this, we can travel to any place, to a certain date. Martha couldn't believe all this.
"Sorry. I have to go." Martha said, picking up her bags and left.
The Doctor just stood there, surprised.

Martha got home, put her shopping away and sat down trying to figure out what had happened.
She went out for a walk, looking for the TARDIS and also the Doctor She found the TARDIS.
"You looking for me?" came the Doctors voice from behind her.