Now would not be a great time to start watching The Mentalist. The show is part procedural and part serial. The serial part of the show is coming to an end, at least part of it, right now. You really would need to go back and watch the whole thing to get where we are. We are finding out who the serial killer who killed Patrick Jane's (main character) family is. After this the show will go in a different direction.
As for the sharks, they really need to pick it up. And my mom so would wrap your gifts for you.