How Was Rita Killed in Dexter?

Rita was killed by a serial killer in the final episode of season four. ... Clyde Phillips claimed the Dexter staff did not know how the finale would conclude until late in the season, but he said Rita's death began to feel inevitable as the story evolved.

Who actually killed Rita in Dexter?

It is revealed in the final scene of the episode that Mitchell killed Dexter's wife, Rita, in the bathtub of Dexter's house, and that he left Dexter's son Harrison in her blood, mirroring the childhood trauma that put Dexter on the path to becoming a serial killer.

Why did they kill Rita off in Dexter?

Episode ended just when Dexter sits back and listens to Rita's voice mail. ... The writers felt that dexter needed a more dark passenger side to him and decided that having Rita negated that idea. So they killed her.