|Date of death:||2000|
|Place of death:||Bare Island, Sydney, Australia|
|Cause of death:||Collided by a truck|
|Profession:||Sean Ambrose's henchman|
|Played by:||William Mapother|
|First appearance:||Mission: Impossible II|
|Last appearance:||Mission: Impossible II|
Wallis is one of Ambrose's men who was on board the flight transporting the infected Dr. Nerkhovich to Atlanta. He later escapes the plane with Hugh Stamp, Ulrich and Ambrose before it crashes in the Rockies.
Later, he is seen watching Nyah Nordoff-Hall through a camera as she enters Ambrose's house. Wallis is also present when Nyah injects the Chimera virus into herself in Biocyte Headquaters. Afterwards, Wallis helps transfer the money from the CEO of Biocyte Pharmaceuticals, John C. McCloy.
After the death of Stamp, Wallis involved in the chase when he led one of the vehicles to pursue Agent Ethan Hunt, a field team leader of the Impossible Mission Force. He will also be killed with Ulrich and another henchman by a truck that struck his car, causing it to explode.