So I have recently started watching Gotham and thought I would share some of my views. Please note that this post contains spoilers.
First off, the cast. The casting done for this show was top notch. Here's a review of each of the characters as I find them (extracts from imdb):
Cory Michael Smith (Edward Nygma):
Great interpretation of the Riddler. He's creepy and still uses silly riddles. The only issue I have is with the character itself. Using the linear time line for Batman, this would make him significantly older by the time Batman arrives. I would have preferred it if this character was used as Edward's father with only small references to a son which we then know will grow up to become the riddler.
Ben McKenzie (James Gordon):
A great portrayal of a good cop in a bad city. The last few episodes have him playing a far darker character, which is understandable considering what has happened to him. His interaction with Barbara is a little too stereotypical at times and feels like it is used to fill episodes often.
Donal Logue (Harvey Bullock):
A great actor and true to what the character needs. I know this character as the typical crooked cop. He is supposed to be the cardboard cut-out for what not to do as a policeman. The good turn he has had in the last few episodes is unexpected, but I don't think it will last overly long. I think they are trying to portray him as a good cop doing his job in a bad way, fitting in with the corrupt and doing the job the only way he knows how.
David Mazouz (Bruce Wayne):
He plays the frightened kid and young detective well. He pulls off the aristocratic manner well and soon has you conflicted on whether you like him or not.
Sean Pertwee (Alfred Pennyworth):
Slightly younger than I would have imagined Alfred, but a great fit none the less. He gives off that feel of a combat surgeon and butler. Always looking to mentor Bruce and steer him away from vengeance (with one exception). I look forward to more of him.
Robin Lord Taylor (Oswald Cobblepot):
Although he starts off seeming a bit useless he get really good later. The acting is superb and makes the character memorable. The character that will one day become the Penguin is really a linchpin in this story. I love the fact that he is not as 'useless' as he seems in the comics.
Jada Pinkett Smith (Fish Mooney):
One of the original characters brought into this story. I must admit I am a bit disappointed with the acting. Everyone else seems to love the way Jada brings this character to life, I find her to be repetitive and boring however. A very one sided character bent on taking over the empire. I hope to see her made a little more cunning.
John Doman (Carmine Falcone):
The original mob boss. He reminds me of a real godfather of crime. John brings this character to life and I enjoy all the scenes he's in. His presence is dominating and you can feel the power he wields.
Other Cameos / Mentions:
Ivy Pepper/ poison Ivy
Richard Sionis / Black Mask (I'm a bit disappointed in this character, I hope they improve him later in the series)
Selina Kyle / Catwoman
Tommy Eliot / Hush (looking forward to more of this)
Bane (okay, not Bane, but the venom used to give Bane his power)
If you are serious about time-line issues, give this series a skip. Otherwise, be sure to watch as there is some good intrigue and great acting.