Episode 64, "No. 17, No. 18, and...! The Artificial Humans Awaken" 
Synopsis: Kuririn spots Dr. Gero/Artificial Human No. 20 entering his laboratory and lets out ki to warn everyone. Inside, Gero activates Artifical Humans 17 and 18, a young man and young woman. Piccolo and Tenshinhan arrive, but Kuririn informs them Gero is already inside. 17 snatches away the control that could deactivate him and destroys it, not wanting to be deactivated again. Vegeta and Trunks arrive. Vegeta wants to challenge the Artificial Humans, but Trunks wants to retreat. Vegeta instead blasts the door to the lab down. Trunks confirms that the androids before them are the ones that plagued his future. Gero orders the pair to attack, but they disobey. 18 wonders about the No. 16 in the lab, but Gero demands she stay away from it. When Gero threatens to shut them down, No. 17 shoves his hand through him and then kicks his head off. He finishes Gero off with a stomp. Trunks transforms into a Super Saiyan and fires a blast that destroys most of the lab, but 17 and 18 come out unscratched, and activate 16. 16 is aloof and doesn't respond to their questions, but confirms he was created to destroy Goku. The androids all decide to go find Goku, despite having disobeyed their creator. Vegeta is angry for being ignored and flies after them, landing next to them on a mountain side road to challenge them. 
Comments:
So, we finally get to the introduction of Artificial Humans 17 and 18, the twin technological terrors, as well as that bulky bionoid behemoth, Artificial Human 16. All right, I'm just having fun copying the alliteration I had to suffer watching all those "next episode previews" for DBZ's dub, with their cheesy narration. I can even do a fair imitation of it. I'll share it sometime.
I love the interaction between Gero/20 and his creations. Seeing that Gero has the remote control that could shut them down, 17 and 18 address him formally, politely, until 17 can destroy it. Then they start to mouth off and disregard Gero's commands. Finally, fed up with him, 17 kills the old man. As Vegeta remarks, they do whatever they want to, like Saiyans.
However, for lack of something better to do, once they're free of Gero, they decide to go off to find and kill Goku, regardless. This pisses off Vegeta, wanting to be the center of attention, and we'll see where that gets him in the next episode. 
Overall Score:
3.5 out of 5
Artificial Humans 17 & 18 - Kids In America from Penguin Truth on Vimeo.
