Discovered at an early age by a Warner Brothers Talent scout, Lapp marked his film debut in 1963 in Rauol Walsh’s “ A Distant Trumpet.” He made his television debut in 1964 “Daniel Boone series” directed by George Sherman. After serving with the U. S. Navy in the Vietnam conflict for two years, Lapp returned home and found westerns to be in vogue. The film that brought Lapp to Hollywood, was in Ralph Nelson’s “Duel At Diablo.” In the late 60’s, his acting ability afforded him to play a variety of guest star roles on various successful network series including, “I Dream Of Jeannie”, “Gomer Pyle”, “Iron Horse” and “Bonanza.”
Lapp took time out in 1968 to appear in John Wayne’s, “The Green Berets” at Fort Benning, Georgia. He went on to New York and attended the Actor’s Studio workshop in New York. His previous stage experience was playing the part of Eugene Gant in the comedy-drama, “Look Homeward Angel” based on the novel by Thomas Wolfe and as Bobby Van Husen in Sandy Wilson’s, ”The Boyfriend.” Yet his guest star appearances on numerous western series, “High Chaparral” and “Gunsmoke”, an unprecedented three times for an actor only 26 years old at the time, contributed to his starring role in “A Time for Dying”, for legendary director Bud Boetticher. This 1969 western was produced by the late Audie Murphy. The film enjoyed critical success, but was never released.
Lapp broke away from westerns in the 70’s in such films as “The Low Price Of Fame” starring opposite Rory Calhoun, and Yvonne De Carlo, “Baltimore Bullet” and a sci-fi series, “Clonemaster.” The Movies Of The Week in the late 70s and early 80s cast him as young men in various kinds of trouble.
In the 90s, Lapp began playing cops and robbers in the films “Silk Stalkings” and “Shattered Image.” He was a weekly contract player in Warner Brothers “Pointman series” starring Jack Scalia, shot entirely on location in Florida.
In 2005, Lapp recreated the character of Dr. John Buchanan in Tennessee Williams, “Summer and Smoke” on the stage in Los Angeles.