Shannen Doherty to appear in 'Riverdale' episode honoring Luke Perry

Shannen Doherty will guest star in the Season 4 premiere of "Riverdale," which is set to honor Luke Perry.

The show's executive producer, Roberto Aguirre-Sacasa, made the announcement Sunday at Comic-Con in San Diego. Perry played Doherty's love interest on "Beverly Hills, 90210." On "Riverdale," he played Fred Andrews, the father of lead character Archie Andrews.

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Doherty's casting on "Riverdale," said Aguirre-Sacasa, is something Perry was rooting for since season one.

Her role is described as "pivotal" and "super-emotional."

The episode will air Oct. 9 on The CW.

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Perry died in March after suffering a massive stroke at age 52.