A major character wasn't the only death the season finale of Dexter was responsible for last night.

The shocking episode also annihilated the competition, shattering a Showtime ratings record and becoming the most-watched episode of an original series in network history.

For the original 9 p.m. viewing, 2.575 million viewers tuned in; that figure increased to 3.078 million when the 11 p.m. replace was factored in. This marks the first time a Showtime drama has brought in three million viewers on a single evening.

If you still don't know who died at the conclusion of the episode, find out NOW!

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.