Timblin was a crew member of Carver's stealth boat (commandeered by Captain Scott) involved in Carver's plot to instigate a war between England and China. To that end, Carver's right-hand man Richard Stamper gets Timblin to pilot the Sea-Vac Drill into attacking a British frigate called the Devonshire, killing many British sailors while only seventeen escaped. Captain Scott then ordered a missile at one of the Chinese MIGs, framing the Chinese Air Force for the ship's attack. Following the Devonshire's sinking, Stamper patted Timblin on the shoulder for a job well done before murdering the seventeen survivors for Carver to cover in his newspaper.
A couple of days later, Timblin was reported to help Carver oversee the imminent attacks between the British fleet and Chinese air force, just as Carver intends to fire a missile (which he stole from the sunken Devonshire) into Beijing to escalate the situation. Fortunately, James Bond and Wai Lin arrive to the rescue and took down Carver and many of his men before setting the missile to explode, destroying the stealth ship in the process.
It is unknown what happened to Timblin afterwards, either he perished along with many of his crewmembers or he may have escaped after Captain Scott told all remaining crewmembers to flee.