Christopher Gorham a dit in an interview he told Sully "you never should have dogged Trish". Payback for Sully trying to get Trish to sleep with him while Henry/Trish were on a break.
Chris Gorham himself cleared that up! He said: "You shouldn't have dogged Trish!" referig to the fact that Sully tried to sleep with her when Henry and her where on a brake.
SULLY'S DEATH - In Episode 13, Sully is in the woods with Henry while he acts suspicious. Sully thinks he is joking and does not buy it. Soon, Henry laughs and tells him who he killed. Sully then tells him to shut up, and then Sully attempts to shoot him without any bullets. Soon, Henry tells him that John Wakefield is behind him. Sully asks Henry how stupid he thinks he is, and Wakefield answers, "Pretty stupid," and then Henry grabs hold of the distracted Sully and stabs him in the side, killing him.