Television
Lansing first appeared on TV on Kraft Television Theatre in 1956. In the 1961–1962 television season, Lansing was cast as Detective Steve Carella on NBC's 87th Precinct series, based on the Ed McBain detective novels. His costars were Gena Rowlands, Ron Harper, Gregory Walcott, and Norman Fell. Also in 1961, he played Jed Trask, a troubled shooter, in the Bonanza episode, "Cutthroat Junction". He guest-starred in two other episodes of the NBC's Western series: "Danger Road" (1970) as Gunny O'Riley and "Heritage of Anger" (1972) as John Dundee. He played Doc Holliday in an episode of NBC's The Tall Man, with Barry Sullivan and Clu Gulager. Lansing starred alongside Clu Gulager again in a 1965 episode of NBC's The Virginian TV series titled "The Brothers". Again on NBC, in 1966, Lansing guest-starred as General Custer in a three-episode segment of Branded called "Call to Glory".
Robert Lansing is probably best known for his role as Brigadier General Frank Savage in the first season of the Quinn Martin production 12 O'Clock High, which aired on the ABC Television Network from 1964 to 1967.
His other television roles include portrayals of an alcoholic college professor in ABC's drama Channing, as Gil Green in the 1963 episode "Fear Begins at Forty" on the NBC medical drama The Eleventh Hour, as a bounty hunter on Gunsmoke, and as a parole officer in a 1968 episode ("A Time to Love — A Time to Cry") of The Mod Squad.
He was the interstellar secret agent Gary Seven in a Star Trek episode ("Assignment: Earth", 1968), which also featured Teri Garr, and was originally intended as a backdoor pilot for an unsold new series.
Lansing played an international secret agent in The Man Who Never Was, and Lt. Jack Curtis on Automan. He also played a recurring role, known only as "Control", on 29 episodes of The Equalizer between 1985 and 1989, which then was spun-off into the TV movie Memories of Manon, which aired on February 13, 1989. He guest-starred in The Twilight Zone episode "The Long Morrow" and in the Thriller episode "Fatal Impulse". He also guest-starred on other television productions such as NBC's Law & Order.
In the 1980s, he did a series of television commercials for Liberty National Bank in Louisville, Kentucky, and for the popular supermarket chain Giant Eagle.
Lansing's final television role was that of Police Captain Paul Blaisdell on the series Kung Fu: The Legend Continues. The role was written specifically for Lansing by series writer and executive producer Michael Sloan, who had worked with Lansing on the series The Equalizer in the 1980s, although Lansing had already been diagnosed with cancer. Despite continuing health problems, Lansing performed in 24 episodes in the first and second seasons. In the final episode of season two, titled "Retribution", Lansing's character of Blaisdell was written out, with the possibility of the character returning if the actor's health improved. The episode, filmed in February 1994, was Lansing's final acting performance. It aired on November 28, 1994, a month after the actor died, and was dedicated to his memory.