Luke Perry will be honoured in the season premiere of Riverdale, with his former Beverly Hills, 90210 co-star Shannen Doherty guest starring.
Mark Pedowitz, president of The CW, told a TV critics meeting that the episode is "a moving piece" and "a tribute to our friend and a well-respected actor."
Perry died in March at age 52 after a massive stroke. His death occurred in the middle of filming for season three and wasn't mentioned on the show. Producers opted until the season four premiere airing October 9 in the US to address what happened to Perry's character Fred Andrews, the father of Archie.
Molly Ringwald is expected to have a bigger role as Archie's mother.
Doherty stars in Fox's BH90210 reboot series debuting in the US on Wednesday. It's expected to also honour Perry.