After leaving military service, Landers took acting classes in New York and worked as a model, appearing in numerous fashion magazines, including being featured in a Playgirl centerfold.
In addition to an appearance in the 1977 film Annie Hall playing the part of a pompous producer, he also had roles in several television programs such as America's Most Wanted.
Landers traveled to lobby for tobacco reform before the United States Congress and the World Health Organization.
An R. J. Reynolds spokesman stated at the time the suit was filed that Landers was free to read the warnings that appeared on cigarette packages in the period when he was modeling.
[1] In a magazine interview in early 2000, he stated that "Looking back on my career, I am ashamed that I helped promote such a lethal and addictive product to the children and adults of this country.