This would make me pretty upset... partially because of the overexposure to the TV, but also because kids really just want to interact with their dad! It sounds like you're home with them during the day so I assume he goes to work, and the evening is the only time they have with him.
Maybe approach him about finding activities that truly let the kids interact with him, not just sitting next to him in front of the TV... toss a ball, play board games, take a bath, do "exercise" (sit ups, push ups, my younger sister loved that). Truly, kids just want to be with us, their parents.
Also, it sounds like you and your hubby should come to agreement on how much TV is allowed total, per day, per week for the kids. Then you might find that you need to cut back on the TV during the day to allow for some evening/weekend TV time... but you'll have your hubby on your side to help enforce the agreed-upon rules.
Good luck!