Whilst visiting one of his hotels to cover up a hazardous landfill there, Robertson was attacked by a giant spider created by the landfill. Kevin tried to protect him, only to be attacked by the creature.
As he was attacked, he tried to call Robertson for help but was abandoned by him to die. His body was dragged away near to the landfill and was later found in a cocoon by the Thirteenth Doctor and Jack. (TV: Arachnids in the UK)