The fall premiere season is hardly over, with CW taking the wraps off of if its new comic book adaptation, Arrow while NBC and ABC unveil Chicago Fire and Nashville. Of course, some old favorites are returning too, and web series Dr. Horrible's Singalong Blog is making its TV debut Tuesday night. Look below for the highlights this week, followed after the break by our weekly listing of what to look out for in TV, Blu-ray and videogames. The Walking Dead After season two's exciting finale we are once again all in on AMC's zombie apocalypse series. Fans of the comic are looking forward to seeing characters like Michonne and The Governor