TV stars with successful careers typically make $150,000 per episode, as of 2015. Unknown actors who get a series regular role usually make between $15,000 and $25,000 per episode.
Salaries vary significantly for TV stars, as lead actors on successful shows sometimes make $1 million per episode or more. Lead actors receive the highest salaries if their show has a small cast and is very successful. Since lead actors often receive similar salaries, shows with large ensemble casts usually don't pay as much.
Stars who have had previous success in movies or other television shows are able to negotiate a high salary. When a show becomes more popular, its stars also often receive higher salaries. For example, the stars of "The Big Bang Theory" received $350,000 per episode. As the show became more popular, they renegotiated and received $1 million per episode.