Call the Midwife has a hurdle to get over with the fourth season, and it hopes to manage it with new introductions.
iZombie nails its effort, and that's in a game that is much harder than most will give it credit for. It's fun, absolutely enthralling, and still has to include a mystery... and zombies. Good luck, everyone else. If you become a fan of one show... well, right now, make it this.
One Big Happy needs you to settle in with it. It's working a theory that you'll like these people, as opposed to having to make you laugh ten times a minute. It has the cast to pull it off, and if you're on board for something that is insanely fun, instead of funny, you'll be glad you gave it a shot.