No Bottles...No Cans...No People

S04E02, Show #74 -- First broadcast 9/21/71
Time on screen: 5 seconds

Bodyguard?

When McGarrett meets the Governor at the airport prior to the two of them talking to Benson (Tom Palmer), a federal agent who has arrived on a plane, Walter is standing behind the Governor with one other guy. Walter's status is unknown, probably a bodyguard for the Governor.