The Master. Sam knew that name. And, God, if he didn't know that face by now he would have had to have been blind as hell. That was the man who had cloned himself throughout the world, taking over the bodies of innocent people in a way that was hardly different from possession as far as Sam was concerned. The only reason Sam had yet to go chasing after him was because people seemed to believe that the incident was purely accidental; that didn't stop Sam from being wary of the man, nor did it help matters knowing that he had done more terrible things where Martha was from herself. Enslaving the human race, starting wars...Sam rubbed his palm along his jaw, shaking his head in pure dislike. That wasn't the type of man Sam could see himself feeling all that favorable toward. In fact, at the moment, Sam was very much comparing him to Lucifer. The end of all life - the end of everything. Sam might not have understood a lot of those technical terms being thrown around - at the very least, they made him pause for a second processing that those were things used in every day speech for Martha and her friends - but he understood the message very, very well. And in spite of all the horrors that he had learned of, if there was one thing that he was certain of, it was that Martha wasn't to blame for what had happened with the Master. It had just been a watch. How could she have possibly known that it was going to bring on the end of the world?
"It's hard for me to begin to imagine half of the things you did with the Doctor," Sam admitted. He had never heard of anything like a time traveling phone box or different alien species' or anything like that until he had met Martha. Even so, Sam felt like the things that he heard from Martha in regards to her experiences shared with the man could only truly be understood if he had been in her position himself. To that extent, he sort of was. Sam still felt that he was more to blame in this situation than Martha could have ever been in her own, but he too knew what it felt like to have the weight of a dying world on his shoulders. Sam only hoped he didn't have to see this planet waste away was Martha had with her own. "How did you stop him? The Master, I mean?" Sam needed to know. There had to be more to it than Martha just walking around the world, right? If anything, Sam felt like walking around the world would have been more of a punishment for one than a way to fight back. Sam couldn't handle roaming through chaos and destruction like that. No way. It'd kill him too much to see the damage that he had done.
That only made him realize that he had to stop Lucifer before similar damages could be done. Sam didn't think he could live in a world that had been turned to hell. He'd die of despair if Lucifer or something else didn't kill him first. And that only made Sam question Martha even more. For someone who spent so much time holed up in the medical center, she sure had gone through some serious stuff in her own right. The average person would have never guessed as much.