The TV has a point I guess. This is a rare strip in which the source of humor comes from outside the characters. While no adult is seen here, one can only guess that an adult wrote that sign and put it on the air.
By the way, it is not true that Peanuts has never pictured an adult figure! We'll see that for ourselves before very long.
The text of ROASTED PEANUTS is copyright 2009-2011 by John Harris. No copyright is claimed over the comic strips, which are here under the principle of fair use. Strips presented for review purposes only. We love Peanuts a whole lot, and wouldn't dream of exploiting it. Please don't sue us; we're only trying to love. Thank you for reading this notice.