How can you ask me to trust you, Walter? [There's strain in his voice, a crackle of disbelief and insecurity.] You were involved with him to some degree, and I cannot simply assume he didn't interpret your allegiance as validation. Enabling him to... Misbehave.

[There's a reason why Chilton would only be responding in text to the others, after this conversation with Walt. Text was controlling, it could obscure emotion. Text was masking.]

A chemist at my side. Weren't you that, to him? Is this just psychiatric turf war to you? He was never much to me to begin with, Walter, why would I want anything to do with a man who has turned himself into a mere archetype?

He isn't even unique in his sequence. I have had friends betray me before.