Hammond refers to an ex-cop and other survivors hold up in a prison. This is a reference to "The Walking Dead", in seasons 3 & 4.
Keith Cox, Co stunt coordinator, fight coordinator and stunt man, played a total of 53 Zombies over the course of 5 seasons.
The title is a nod to a line used by T-Dog on The Walking Dead.
Murphy's full name is Alvin Bernard Murphy.
The actor who portrays Delta Operator Hammond was over 50 years old at the time of filming. Firstly this is more than 25 years older than the typical Lieutenant and 2 decades older than the typical Delta Operator. Furthermore, as the entry level commissioned officer rank, Lieutenants are not even eligible to try out for Delta Force as Delta only admits seasoned soldiers to their Selection Course and the Operators Qualification Course.