Happy in the part

As far as I can see, I'm booked solid until Jan. 30, 1985, and at present my agents are working on a more extensive booking. You have a very fine cast and I'm pleased by your offer to join this stellar group. However, the series I'm involved in now gives me the rare privilege of doing not only an extended appearance but also some writing and directing.

(replying to an invitation for a guest appearance in a television drama)