I love this because even though Shawn and Jack don't have long scenes together the scenes where they are together are great. I love that Jack doesn't put up with any of Shawn's crap and it's clear that he really wants a relationship with Shawn even more than he wants one with Chet. Jack is also the only member of Shawn's biological family who seems to actually care what happens to Shawn, he not only gives him a home since as of this episode once he pushes Shawn into living with Jack, Chet takes of again and doesn't come back till midway through season 6. Once Jack shows up and becomes a part of Shawn's life he stays there and is there for Shawn through a lot of difficult times, even though they are never super close in all of their interactions together you can see how much they actually care about and love eachother.
Review of Brothers
