Switch Glitch

Aliens Used

 * Alien #1
 * Alien #2

Heroes

 * Ren Anderson (cameo)
 * Ren Edward (cameo)
 * Ren Tenneyson (cameo)

Villains

 * Villain #1
 * Villain #2

Trivia

 * This is the episode where Ken and Cassie's relationship hugely strengthens.