“Doogie Howser, MD” and “Hill Street Blues” star James Sikking dies at the age of 90

James Sikking, who starred in series such as “Doogie Howser, MD” and “Hill Street Blues,” has died at the age of 90.

In a statement Sunday evening, Sikking’s spokeswoman Cynthia Snyder said the actor died from complications of dementia.

Snyder told Fox News Digital: “In a remarkable career, Sikking’s wonderfully exciting face gave us drama, comedy, tragedy and hilarious farces. His career spanned six decades on television, film and stage.”

She added: “His talent, integrity and imagination captivated and delighted audiences.”

James Sikking, known for roles in series such as “Doogie Howser, MD” and “Hill Street Blues,” has died at the age of 90. (ABC Photo Library/Disney General Entertainment content via Getty Images)

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In “Doogie Howser, MD,” Sikking played Dr. David Howser, the father of the series’ title character, played by Neil Patrick Harris.

Previously, he appeared in “Hill Street Blues” as Lt. Howard Hunter, a dapper Vietnam War veteran who led the Metropolitan Police Department’s Emergency Action Team.

Sikiking based his character’s uptight and eccentric nature on an instructor he had during basic training when his military service interrupted his time at the University of California, Los Angeles, where he graduated in 1959.

“The drill sergeant looked like he had hair made of steel, and his uniform was so starched that when he took it off in the barracks, you knew it would be lying in the corner,” he told the Fresno Bee in 2014.

James Sikking in the role of Hill Street Blues

Sikking was nominated for an Emmy for Best Supporting Actor in a Drama in 1984. (Paul Drinkwater/NBCU Photo Bank/NBCUniversal via Getty Images via Getty Images)

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In 1984, he received an Emmy nomination for Outstanding Supporting Actor in a Drama.

In addition to his work in “Hill Street Blues” and “Doogie Howser, M.D.,” Sikking also appeared in “Star Trek III: The Search for Spock.”

Later in his career, he made guest appearances on shows such as “Leave it, Larry!” and “The Closer,” as well as roles in films such as “Fever Pitch” and “Made of Honor.”

Neil Patrick Harris and James Sikking in a promo still for Doogie Howser MD

Sikking played Neil Patrick Harris’ father in “Doogie Howser, MD” (ABC Photo Library/Disney General Entertainment content via Getty Images)

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Sikking was born in Los Angeles in 1934, the youngest of five children. His early work includes an uncredited role in Roger Corman’s Five Guns West and a small role in an episode of Perry Mason.

He also had guest roles in several series such as “Mission: Impossible”, “M*A*S*H”, “The FBI”, “The Rockford Files”, “Hawaii Five-O” and “Charlie’s Angels” before getting his role on “Hill Street Blues”.