After Kira's life is threatened, Sarah is on the warpath, but Dr. Leekie makes her think twice about her plans for revenge. Meanwhile, Cosima faces the truth about Delphine, forcing her to choose sides. Now, it's up to Sarah to decide the killer's fate, but the truth about where Sarah came from changes everything.

If there's one thing all nerds have in common, it's a deep and abiding love for science fiction.

Why, some nerds love Sci-Fi so much, they would devote an entire hour of television to it. That's right: time to set your eyeballs to "watch!" It's "The Nerdist" Tribute to Sci-Fi, because, let's face it, most of us would rather live in the Shire or Flotsam Paradise than in our current abode.

We'll hear from horror master Guillermo del Toro - the nicest man in Hollywood. He's giving us the lowdown on one of the most anticipated movies of the summer, "Pacific Rim". Also joining Chris and the gang will be the angelic Katee Sackhoff, star of "Battlestar Galactica" and "24".

We'll find out what fictional world they'd like to dwell in and then we'll put their knowledge of British programming to the test in the television trivia game BBC(een) It!

Also, Matt Smith sends one of his battalion of mechanical clones to talk more about life as the Doctor. All that, plus an exclusive look at the supervillain version of TED Talks (aptly named ZOD Talks) and the comedic stylings of Ron Funches.

This show killed at the Mos Eisley Cantina and you'll love it too!

With a religious occasion approaching, Sarah performs a spiritual cleansing in the local creek that's unfortunately witnessed by Doris Collins. While Sarah finds it hard to deal with Doris' reaction to her nudity, it is Sarah's own personal demons that she is struggling with most.

When Captain America is apparently destroyed by Red Skull, Iron Man reunites the team to avenge him.

After Red Skull steals Tony's armor & declares himself the Iron Skull, M.O.D.O.K. unleashes a plan to turn the Avengers on each other and then New York.

The final set of hopefuls audition in front of the judges hoping to impress and gain a place in the next round of the competition. Those hoping to impress include Chasing The Dream, Freelusion, James More and Meat Diva. The judges then have to select which forty five acts will make i through to the live semi final stage of the competition.