Wednesday:

Hey, Charlie, you still coming back today?

Later on:

You said you were coming back today, right?

Thursday:

This ain't funny, Charlie. It's not like you to not respond. What's going on?

Later:

Charlie, what the fuck is going on? You and Merlin can't be that busy, can you? It's okay if you need me to stay a little longer, but I'd like to know.

Even more later:

[Voice getting very concerned now.] No, seriously. Answer.

Friday:

[Sounding like he might be on the verge of tears.] Charlie.... Where are you? You didn't go home, did you? Please be okay.