'Hannibal' trailer: Will it be the most violent show on network TV?

The series premiere of NBC's "Hannibal" is just three weeks away on April 4 and the network is teasing what to expect from the cannibal doctor with a new two and a half minute trailer.

Can Mads Mikkelsen fill Anthony Hopkins' Oscar-winning shoes in the title role? And how will Hugh Dancy fare as FBI criminal profiler Will Graham, previously played by William Petersen (in Michael Mann's "Manhunter") and Edward Norton (in Brett Ratner's "Red Dragon")?

One thing the trailer doesn't hold back on: the series' apparently very graphic violence. They're not kidding with that "Viewer discretion advised" warning.

"Hannibal" also stars Laurence Fishburne as Jack Crawford, Caroline Dhavernas as Dr. Alana Bloom, Hettienne Park as Beverly Katz, Scott Thompson as Jimmy Price and Aaron Abrams as Brian Zeller.

Check out the whole cast in our Season 1 photo gallery.