John Allen Nelson is an American actor and screenwriter.^[1] He is best known for his roles on television as Warren Lockridge on Santa Barbara, John D. Cort on Baywatch, Walt Cummings in 24 and Silas Bunch in Crazy Ex-Girlfriend. He is also known for starring in the cult classic science fiction comedy horror film Killer Klowns from Outer Space.

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Nelson portrayed original series character Warren Lockridge on the American soap opera Santa Barbara from August 1, 1984, to April 29, 1986. He starred as the title character in the low-budget 1987 comedy-fantasy Hunk where a nerd was transformed into a golden-tanned, muscular hunk after "leasing" his soul to the Devil.

Nelson co-starred with in the 1988 cult/sci-fi epic Killer Klowns from Outer Space.

Nelson co-starred (and later recurred) in the early seasons of the series Baywatch as "John D. Cort," a lifeguard who is ultimately forced to retire because of retinitis pigmentosa. Later, Nelson co-starred with fellow Baywatch alum Gena Lee Nolin in the syndicated Sheena, Queen of the Jungle.

Nelson also co-wrote the screenplay for the martial arts-yarn Best of the Best 2, which was released in 1993, as well as American Yakuza starring Viggo Mortensen. The following year, in 1994, Nelson co-wrote and co-starred in the movie Criminal Passion which featured Joan Severance and Anthony Denison.

Nelson may be best known for his role as Walt Cummings in 24, or the role of Senator Jeffrey Collins in the 2006 Fox drama Vanished.

Nelson also appeared as Paul, Monica Geller's boyfriend (also known as "The Wine Guy") in the first episode of Friends. His most recent role is Everett Reid in Virgin River.