'The Last of Us' episode 5: What does Ellie's message on Sam's board really mean?

Oh, so you thought things couldn't possibly get more emotionally draining than The Last of Us episode 3, did you?

Well, it looks like we were all wrong about that.

After a tense, action-packed Kansas City escape followed by a violent showdown with Kathleen's militia and a erupting sinkhole full of Infected, it finally...