source : wikipediaLance LeGault (b. Henry Legault on May 2, 1935 in Chicago, Illinois, U.S., sometimes credited as W. L. LeGault) is an American actor who stars in films and on television. Lance grew up in Chillicothe, IL and graduated from Chillicothe Township High School in 1955. Lance's first 3 feature films he starred in were 3 Elvis Presley movies, Girls! Girls! Girls! (1962) in which he was a stunt double for Elvis Presley, Kissin' Cousins (1964), and Viva Las Vegas (1964). His most recent film is in the 2005 movie Tugger: The Jeep Who Wanted to Fly.
Lance has starred on some TV shows and in TV movies, his best known TV role was in the 1980s hit series The A-Team as Colonel Roderick Decker, a U.S. Army Colonel who tried to catch the fugitive Vietnam Vets. Lance played the role of Col. Decker from 1983-1986. He also had a recurring role in the other 1980s hit TV series Magnum, P.I. as a colonel, Colonel 'Buck' Greene.
Lance LeGault ...
from Colonel Decker chasing the "A Team" :

to Colonel Buck Greene, not Magnum's best friend :
Colonel Decker is certainly more sympathetic than very dark Colonel Buck Greene !
He was Colonel Paul Stark in "Simon and Simon" too !
Lance LeGault is "the" very strict guy, cult figure for so many TV series of the 80's/90's. (police, army, security, politic, etc..)
source :
http://www.imdb.com/name/nm0499223/