The main reason Warrick hasn't been seen in a few of the episodes this season is because of the end of his marriage and the fact he started taking sleeping pills and replaced his gambling addiction with an addiction to sleeping pills. As i said in my earlier this season is a season of rebuilding and this will be one of the many things we can expect them to approach once the writers strike is over and they get back to writing new episodes. I also think that this season would be a great time to bring in a love interest for Nick or Catherine and I know i have post that says something about a romance between Catherine and Warrick but find her another love interest would be great.
