The Doctor waited patiently as the vehicles approached. well, to be more precise he walked towards them and waved, hoping to attract their attention, while Rose did the same. That seemed to work, and soon the snowmobiles were nearing them at a reduced speed, seemingly intent on meeting them and finding out who they were. He noticed Rose drawing nearer to him but didn't shy, instead standing tall and waiting with a grin on his face at the opportunity to meet new people, new life forms, even if they ended up being evil. 

The three got off their vehicles and stepped forward, the one in front removing her helmet to reveal a webbed face and scaled skin, indicating somewhat that she was a reptilian based life form, yet that would be a strange thing to find on an ice planet, given their predisposition for warmth. Then again, he had seen weirder things. He let Rose speak as he thought back to try and identify the species, her getting confirmation that they weren't in a restricted area, which was good, and that there was a resort near here, which was good as well. 

Now, the news of the missing girl was a bit intriguing. Not that a person going missing amongst a galaxy was that weird, but the Doctor had a sense for when things weren't all they seemed, and now it was tingling. "Pleasure to meet you Mykleen," he interjected. "I'm the Doctor, and this is my companion Rose Tyler." Introductions made, he moved along with the group, getting on the snowmobile behind Zaxk, as indicated. The machine was built tough, to take the vibrations and rough treatment it got on the ice, but it was comfortable enough. The lack of a helmet would probably be a hindrance though. "So what does local security do here anyway," he asked from behind Zaxk. "I can't imagine there are many things that need to be protected against on a dead ice planet, especially if they felt it was safe enough to put a resort on it and rebuild the atmosphere form scratch."