Fresh off an episode that took us into Ryan's past, Castle Season 5 celebrates a milestone Monday night:

Episode 100!

Too bad Rick won't be able to stand up and celebrate. Confined to a wheelchair and unable to write due to pain medication, the writer will be chomping at the investigative bit, anxious to be included in the latest case.

Is he losing it? Is he in danger of going all Rear Window on Beckett and company? No, Castle claims in the following hilarious clip. He just wants to play Charlie to his friends' Angels...

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.