Turlough looked long and hard at the Doctor. "That" he said, gritting his teeth in case he said something he shouldn't, "was the worst landing you have ever made!"
The Doctor humphed. "Well" he said, "You try landing a TARDIS after a close encounter with a black hole then!" and with that opened the doors and strode out. A second later, Turlough heard a shout. It was the Doctor.
He dashed outside to see the Doctor being besieged by a group of soldiers. Roman soldiers.
"Hang on, Doctor!" Turlough shouted and was about to enter the melee when a small person wandered up, wearing a winged helmet, a black shirt and red trousers. He stopped as he witnessed the scene and then took a small container from his belt, drank the contents, and then charged into the melee. The next thing Turlough knew there were Roman soldiers flying everywhere. He even had to duck to avoid being clobbered by one himself. As the scuffle and the dust died down, he saw the small person and the Doctor shaking hands.
"Turlough, come here" said the Doctor, "I'd like you to meet an old friend of mine. His name's Asterix"
Turlough looked at Asterix and at the Roman soldiers lying around the place. "He did that?" he asked.
"Of course I did!" said Asterix, "I may be small but I don't take no for an answer!"
"Yes" said Turlough, perplexed
"Well, do excuse me, I must carry on hunting for boars" said Asterix, "I'll tell the chief that's you're here again, I think you'll like how we've progressed since your last visit." and carried on his way, then stopped. "Oh, by the way, where's that dog of yours?"
"Somewhere else" said the Doctor, looking up at the sky
"Oh!" said Asterix, "I'm sorry to hear that" and he went into the forest.
"Doctor" asked Turlough, "How do you know him and what he did just do?"
The Doctor laughed as he headed away from the forest, "Long story, Turlough, long story!"