A notable later appearance was in the role of "Herrold" in the 1980 television movie The Ordeal of Dr. Mudd, a dramatization of Samuel Mudd, the Maryland physician who was imprisoned as an accomplice to John Wilkes Booth in the assassination of Abraham Lincoln.
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Halpin was born in Astoria, Queens, New York City to parents, Helen and Eugene Halpin, and grew up with his family in Long Island City.
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Halpin's most famous role came when he was picked to play Sandy Ricks in producer Ivan Tors' 1962 (released 1963) feature Flipper.
Richard O’Barry started out capturing and training dolphins for the Miami Seaquarium and through the 1960s became the head trainer for the five dolphins who collectively played Flipper on the popular American TV show, while also serving as stunt double for show cast member Luke Halpin.
The actor Luke Halpin offers a sympathetic portrayal of Sandy King as the youngest member of the Curly Bill Brocius gang in the 1968 episode "A Mule ... Like the Army's Mule" of the syndicated television series, Death Valley Days.
Robert Yuro played Brocius in the episode "A Mule ... Like the Army's Mule" (October 5, 1968) of the television anthology series, Death Valley Days, hosted by Robert Taylor, and also starring Sam Melville as Army Lt. Jason Beal and Luke Halpin as Sandy King, the youngest member of the Brocius gang at the time.
Luke | Gospel of Luke | Luke the Evangelist | Luke Skywalker | Cool Hand Luke | Luke Perry | Luke Ravenstahl | Luke Bryan | Lucky Luke | St. Luke's-Roosevelt Hospital Center | Luke Goss | St. Luke's Hospital | Luke Kelly | Luke Wilson | Luke Kirby (actor) | Luke Kirby | Luke Jensen | Luke Brookshier | Guild of Saint Luke | St Luke's Hospital | St Luke's Church | Marjorie Halpin | Luke Tittensor | Luke Tarsitano | Luke Ricketson | Luke Johnson | Luke Halpin | Luke Fair | Luke Doucet | Luke Dimech |