Played a Chinese woman on Bonanza
Oh man, I couldn't even watch it, and I love Marlo Thomas. She must really cringe if it ever comes up. Fortunately, at least it's a comedic role, but that might make it even worse.
What's bad is she speaks in that "no tickee, no washee" mock Chinese patois.
Plus Bonanza was never known for nuanced characterizations, so she ends up looking really silly.