Another egregious example was LOST. It was insanely popular so it kept just printing money, so they threw out the ending they originally planned and tacked several extra seasons on the show, with increasingly retarded plots. It's been a decade and I am still mad about the ending. Sawyer's dad called it out in the first season, and it seemed like a reasonable explanation at the time, but then there was a mysterious bunker with an old computer and a hydrogen bomb and Egyptian statues and a smoke monster and a pendulum and then in the final episode, HA HA HA NONE OF THAT MATTERED AT ALL, SAWYER'S DAD WAS RIGHT, LOOK AT US SUBVERTING YOUR EXPECTATIONS. Blergh.