https://www.looper.com/432379/the-tv-episodes-that-actors-refused-to-take-part-in/

Here are TV episodes that actors refused to participate in.

One glaring omission: Robert Reed wanted no part of what turned out to be the farewell episode of the original "Brady Bunch" series, the one where Greg's hair turned orange all because of "Bobby's Hair Tonic" (aka Neat and Natural Hair Tonic).