Something weird is happening. Humans are being chased and bitten by some sort of ghoulish creatures. It’s the plot of the cult-classic movie “Night of the Living Dead,” produced in 1968, and is going to be performed live at Three Brothers Theatre. This time it will be set in Waukegan in the year 2018. Are the hairs standing up on the back of your neck? Come to the show, it’s safe at the Theatre. Really.