Harrison Ford is not very good in it—perhaps not a great actor generally. His pretending to be a nerd/fan in Zhora's dressing room is too cringey to watch it's so bad…

Harrison Ford is playing Rock Deckard, a detective (not an actor) who hunts down artificial humans. At least to begin with, he and his fellow detectives don't have much respect for the replicants, so he thinks it will be easy to manipulate Zhora and get some information out of her before he kills her.