Continuity mistake: The amount of water in the pitcher on the table that Callister is sitting at changes a couple of time during the scene.
Continuity mistake: When Callister enters Cafe Diem for the first time he keeps walking as he enters. The camera shot changes and he is now standing near the door then begins to walk further in.
Chosen answer: He's still around, we've just not seen him lately, as scenes with Blake have been mainly at work, where Kevin wouldn't be.
Tailkinker ★