The ability of the actors to evoke emotion and believability is a crucial mark of its success. Your review can evaluate the quality of the actors' performances and how they contribute to creating a realistic, entertaining story. Focus on the actor who portrays the show's central character, using specific examples to illustrate why his performance is successful, and also point out the supporting actors who add depth and meaning to the story. If you're reviewing an established show, consider how the characters have changed throughout the series and how the actors' performances contributed to this development.