Private Wayne Jessup was a member of David's group and also the expedition to the pharmacy. He appeared in both the flim and book.
In high school, Jessup had a crush on Sally, and flirted with her, but never drew up the courage to ask her out.
He, Morales and Donaldson are on a ten-day leave, and arrive at the Grocery Store. However, the three are disappointed when an MP arrives to inform them that all leaves are cancelled, and orders the three to meet him back at his jeep in five minutes. However, Morales, Donaldson and Jessup are trapped inside the store when the Mist engulfs the town outside the market.
On the first night of the phenomenon, Jessup confesses his feelings for Sally to her in the locker room, and the two share a passionate kiss. However, shortly after, Sally is stung by a Scorpion-Fly when Scorpion-Flies and Pterobuzzards break into the store. Jessup attempts to save Sally, but the Scorpion-Fly's neurotoxin kills her.
The next day, heartbroken by Sally's death, Jessup joins David and the others in the expedition to King's Pharmacy. When they arrive there, they discover the MP cocooned to a pillar in web silk. David and Jessup try to pull the MP down, only to watch in horror as he screams that the mist is the Government's fault, then hatches a swarm of Gray Widowletts.
The group is then attacked by the Gray Widower parents, and David and Jessup try to save an unconscious Bobby, but when Bobby dies of his leg wound, Jessup leaves his body to be devoured by the Gray Widowletts. Jessup and the rest of David's group other than Mike escape the pharmacy back to the market.
Mrs. Carmody Wayne Jessup accuses that caused this catastrophe, and then Mr. Mackey Wayne Jessup stabs in the stomach and the group of followers cast out of the grocery store to Wayne Jessup, and that's when a Arachni-Lobster appears and kills Wayne Jessup.