A pioneering TV producer and director who helmed nearly 4,000 shows in his career and worked with such stars as Jack Benny, George Burns and Lucille Ball in a 40-year career, Greg Garrison was perhaps best known as the man who did the heavy lifting behind the charming and seemingly effortless The Dean Martin Show (NBC, 1965 to 1974) and Martin's popular Celebrity Roast specials (NBC, 1974-1979