"They were video diaries from the train's previous crew. The train believes they're still out there, and that we can save them."

Maybe Jake's wrong to trust them...but call it detective bias. And he's making a case for the crew! Or so he thinks.

"It started out as ordinary stuff, but then they all mention being called back to their home planet to fight a sudden robot army invasion. After that, some bright colorful shapes invaded that were apparently dangerous, because the planet was destroyed and most of their crew ended up dead. Whatever those 'shapes' were, I think they're still out there."