Jonathan Harris, who played the insufferable villain Dr. Zachary Smith on the 1965-1968 "Lost in Space" TV series, has died. He was 87. The Associated Press reports that he died from a blood clot in his heart while receiving therapy for an ongoing back problem.

He was actually born in the Bronx; his proper English accent and manner were all a persona. On "Lost in Space," he played a saboteur who was trapped on a spaceship with a family of explorers. He is well-remembered for his very funny pairing on the show with Robby the robot, whom he often called a "bubble-headed booby."

After "Lost in Space," he made guest appearances on many TV series. He became a very busy voice actor. He was Geri the cleaner on "Toy Story 2," and Manny on "A Bug's Life." Among many other roles were Era on "Buzz Lightyear of Star Command," Miles Warren on "Spider-Man," and Lucifer on "Battlestar Galactica."

Harris did not take a cameo role in 1998's "Lost in Space" movie like several of the original show's cast members did. He gave a classic reason why to Conan O'Brien on "Late Night."

"I play Dr. Zachary Smith, or I play no one at all. I do not do bits."