The show is largely inexpensive for NBC to produce and has received critical acclaim even if the ratings aren't as high as the network would like. The second season has been about the same as the first in the ratings, even in a Friday time slot which generally has lower ratings. It has averaged a 1.5 rating in the adults 18-49 demographic and around 3.9 million viewers. It didn't beat Dracula in ratings (which is still in limbo) but has a lot of buzz from fans and critics.
The show joins other returning dramas Chicago Fire, Grimm, Law & Order: SVU, The Blacklist and Chicago PD. NBC has also ordered new dramas Allegiance, State of Affairs, Odyssey, Constantine and Mysteries of Laura (starring Debra Messing).
There are some that believe with Constantine getting picked up, it doesn't bode well for Dracula. However, Dracula, which stars Jonathan Rhys Meyers, is produced in a similar fashion to Hannibal.
Now the fans of the cannibalistic serial killer can rest easy, as he's not going away any time soon.