Mystery icon and all-around good guy Michael Connelly will be appearing in the season two premiere of CASTLE.

This tidbit comes from Mr. C’s website:

September 21, 2009. ABC TV Show Appearance
Castle
“Castle” is a 1 hour witty drama about a famous crime and horror novelist, Rick Castle, who helps the NYPD homicide department solve crimes. Michael Connelly will appear as himself in the season premiere, which airs September 21st at 10pm (EST). Check your local listings for time in your area.

Previously, James Patterson and Stephen Cannell have appeared, as themselves, playing cards with Castle.