There is time . It's matter of the writers following on their storyline and doing it . They are not the best when it comes to following up on ideas and stories so I could never be sure whether they would explore something or not.

I mean they had that character that was in Kandahar with Jay in the show for almost 2 seasons and they still didn't explore his military past. The only thing they did was to mention that Jay used to drink a lot when he came back from his last tour. I hardly call this exploring his past. It's not like any fan expected for him to have had the time of his life being Ranger in Kandahar.