Wilcock was a Special Forces soldier who aided the ARC team during an sauroposeiden incursion at Surrey-Quays. His main task was to guard the surrounding perimeter until Abby commandeered a car he and another soldier were waiting in.
When the sauroposeiden herd returned through the anomaly he and multiple other soldiers accompanied Becker through a Cretaceous anomaly. They had attempted to make friendly contact with the men in Tom Samuel's refinery but were instantly attacked.
Wilcock was last seen being ordered by Becker to keep watch over the surrendering scientists and soldiers.