To leave the train station, he actually had to go through a security process. When it was The Doctor's turn, he stepped up and looked at the pony. They stood in silence for a moment, before The Doctor prompted, "Yes?"
The pony asked, "So, identification pass and such."
"Really? Last time I was here there was no such thing necessary at a train station." The pony stared at him stubbornly and The Doctor sighed. "A pass at a train station, next thing we know, we'll need a pass to go on the loo." He fumbled in his jacket for his psychic paper and took out what he thought was it. He showed the pony what he had and said, "Here you go, a..." The Doctor noticed his mistake and quickly rethought his sentence before finishing. "A scroll. For..." He glanced at the scroll. "The princess, Celestia. I am the courier service and they are starting to employ non-winged ponies. We take the train instead." The pony looked at him suspiciously. "Fine, you need a pass to?" This time he took his actual psychic paper out and presented it to the pony. "Loco Motive, courier by train. Happy?" The Doctor felt sorry to steal and identity, but this pony was beyond unnecessarily annoying. "Good. Allonsy."
He put his psychic paper back in his jacket and looked at the scroll. "I definitely don't remember having this." He looked around, before slipping into an empty alleyway about 200 meters from the station.
To whomever reads this letter: First of all, I thank you for taking the time to read this. Time is perhaps the valuable resource I have right now, so I shall get right to the point.
Changelings have taken over the castle in Canterlot. Myself and the other Princesses, as well as the Six Bearers of the Elements of Harmony, several citizens of Canterlot and Ponyville, as well as a few members of the Royal Guard have all been taken prisoners in the Crystal Dungeon beneath the castle. I advise you to be careful who you reveal this to, since as you may know, when Changelings take prisoners, they always replace them with decoys--exact physical replicas. Whoever hears this may at best, simply not believe you. At worst, you may end up telling another Changeling. Though not impossible to spot, detecting them has become much harder than it used to be. Chrysalis, the Changeling Queen is controlling the Hive remotely from Manehatten, at least that's the direction I sense her signal to be coming from. YOU MUST DO WHATEVER IT TAKES TO STOP HER. She is certain to be disguised and well-hidden, and is to be considered extremely dangerous.
Despite this, my faithful servant has selected you for this mission, and I have great faith in his judgement. Do not worry about us here in the Dungeon, for Chrysalis will not kill us; she is far too prideful for that. She would rather keep us alive so she can parade us around after she has taken over Equestria. What is more important now is that you find Chrysalis and stop her. If you have as much faith in yourself as I have in you, please go to the park fountain at sundown and wait for the others. All who have been selected will be holding a letter exactly like this one, so do not lose it. Godspeed, and may the Elements of Harmony be with you in spirit. Yours sincerely, Princess Celestia
Someone know I'm here. This was the first thing he thought when he finished the letter. He knew that the letter was specifically meant for him. He had had his share of letters to know that this wasn't a mistake when it happened. He finally had his problem and it was gonna be one hell of one. He slipped back out of the alley and made his way along the road. He stopped someone trotting the opposite direction and asked, "Could I have directions to the park?" He pointed east and The Doctor said, "Thank you." The pony nodded back and went on his way. The Doctor looked at the pony who had not uttered a word for a second, before continuing on.
After a quick hike, he was at the park, and he knew it. It was majestic for such a run-down city that looked so close to the Earth Philadelphia (He just couldn't get around the names, which were the obvious hints for him that this was a parallel universe). He entered on the first path he saw, not taking the earlier routes on the grass due to the signs saying, Don't trot on the grass.
Within minutes he was at the fountain, which sprouted water in all directions and was surrounded by a wide walkway with at least 8 benches around it. He decided against sitting on the rim of the fountain and examined the benches more. He realized they were aligned to be placed in the eight compass directions that had two or less letters pertaining to N, S, E and W. He sat at the north one.
((OOC: I hope nobody already described the fountain.))