The fourth season of Dexter premieres this Sunday night on Showtime.

You can watch a couple clips from the opening episode now, as Dexter adjusts to family life and to the presence of a new serial killer in town: The Trinity Killer, played by John Lithgow.

According to Michael Ausiello's latest spoiler column, this murderer will claim the life of a major character during the first half of the season. Who will it be? Our money is on Quinn.

In other Dexter storyline news, Dexter and Rita will welcome a very surprising houseguest in November. No guesses here on the identity of that individual.

But now is a great time to catch up on your favorite Dexter quotes in order to prepare for the new season. We can't wait.

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