AMC has already warned those on The Walking Dead to not look back, including that as a tagline on the recently-released midseason premiere poster.

But now the highest-rated series in cable history is imparting new words of advice, to Rick in particular, in the following trailer for its February 9th return:

WAKE  UP!

That's what we hear Carl screams at his father in the new trailer, while we also watch a rundown of our characters (minus Hershel, sadly) that includes a seriously badass Daryl and a terrified Glenn.

Watch The Walking Dead online to catch up prior to fresh episodes returning and then check out new footage below:

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.