Big Brother throws the Houseguests the ultimate summer bash, where they'll compete for prizes, perks and power. Also, Ziggy Marley stops by to surprise the Houseguests with a special performance.

A Cloud 9 Olympics promotion gives Amy the chance to meet her childhood hero, gold medal-winning gymnast Missy Jones. Meanwhile, storewide "Olympic fever" causes Glenn to have some difficulty balancing his extreme patriotism, Jonah to learn a secret about Mateo's past and Dina strives to create a "closing ceremony" her colleagues will never forget.

Riley has trouble with her debate assignment when she must argue if people are naturally good or evil.

Clues from Khlyen's Red 17 transmission lead Dutch, D'avin, and Alvis to an old research facility on Arkyn while Johnny and Pawter try to rally outside support in the impending war for Westerley.

The U.S. military has long denied that the infamous 1947 Roswell crash was anything other than a weather balloon, but FBI files released in 2011 include a memo to J. Edgar Hoover regarding the recovery of not one, but three "flying saucers". Could the U.S. government really have extraterrestrial crafts in their possession? Ancient Astronaut theorists say yes, and claim that Roswell is just the tip of the iceberg. Over a dozen other UFO crashes were reported all across the world around the same time as Roswell, and it is rumored that the wreckage from these incidents was retrieved and hidden away at secret military bases like Area 51 in Nevada, Kapustin Yar in Russia, Pine Gap in Australia, Rudloe Manor in England, and even in the remote hills of China. But if true, what happened to these alien spaceships?

A Blink Drive test goes awry, propelling the Raza to a parallel reality.

Actor Howie Mandel and television personality Malaysia Pargo are interviewed; Flying Lotus performs.

Keen to win his 8th and final Kalos gym badge, Ash challenges Wulfric to a battle but his Avalugg proves to be tough.

When Spike travels with Twilight and Sunburst back to the Crystal Empire to visit Flurry Heart, they discover the entire empire in a panic due to the reported presence of Changeling spy.