I love this show so much. It's my long held belief it's the Batman '89/Batman Returns offspring and it does a great job of mixing up the villains, who are well written and quite interesting to follow, with the very gradual transformation of Bruce into The Batman. I LOVED the "Jokers" AND AM VERY ANGRY AND SAD THAT THE UPCOMING FIFTH SEASON WILL BE THE LAST... SHOULD HAVE GONE TO AT LEAST 7. Excited to see how it all ends... GREAT BLU RAY TRANSFER AND SOUND AND THE SHOW IS GREAT FOR REPEAT VIEWING. It's like watching a 20 hour long Batman '89 movie, which is just fine with me.
Gotham stands out among its contemporary DC brethren (e.g. Flash, Arrow, Supergirl, et al), not by taking itself too seriously, but by striking a perfect balance. It knows its inherently silly to see men and women prancing around in costumes, calling themselves by special names, but it never gives in to self-mockery. Season 4 is in good form, gently pushing Bruce to the forefront as the hero he'll eventually become. The cast continues to do well, in particular Sean Pertwee's Alfred and Ben McKenzie's James Gordon. Overall, a great show that continues to entertain.
I've enjoyed the first three seasons of Gotham, and was pleased by the fourth season, although some reviewers gave it poor marks. The show does a good job balancing the large ensemble cast. Although not every character gets an episode centered around him or her, I think most of the characters had good material to work with throughout the course of the season.