"We've got time," Doc quips with a cant of his head, perhaps somewhat selfishly. Even if there is some sense of urgency for him to be returning, he's got nothing but time and he's come to take that for granted.

Besides. There are no frontier solutions for Malcolm's hypothetical scenario of them all going mad and killing each other. Unless he wants to conjure up in his mind six different ways to kill another man with a butter knife. In which case, he does not need Doc Holliday for that.