In this episode, Bulma and Trunks are trying to stop the Androids from killing the Z-Warriors in the future. Trunks explains to Vegeta that traveling back in time may have caused a butterfly effect, and the Androids that kill him in the future could still appear.
Meanwhile, Dr. Gero is seen trying to recover from his injuries and is planning to use Androids 17 and 18 to defeat the Z-Warriors. Androids 17 and 18 are activated, and they are initially obedient to Dr. Gero's commands. However, they soon turn against him, and Android 17 kills Dr. Gero.
The episode ends with the Z-Warriors preparing to fight Androids 17 and 18, and Dr. Gero's secret project, Android 16, is revealed.
Here are the key facts extracted from the text:
1. Trunks has traveled back in time to warn the Z-Warriors about the Androids.
2. Trunks is the son of Bulma and Vegeta.
3. Dr. Gero is the creator of the Androids.
4. Android 17 and 18 are activated by Dr. Gero.
5. Dr. Gero's lab is located outside North City.
6. The Androids 17 and 18 are not following Dr. Gero's orders.
7. Dr. Gero has a remote control that can shut down the Androids.
8. The Androids discover the remote control and decide to keep it.
9. Android 16 is a secret project that Dr. Gero is working on.
10. The Z-Warriors, including Goku, Piccolo, Krillin, Tien, and Trunks, are searching for Dr. Gero's lab.
11. Bulma is taking care of her 10-month-old baby, Trunks.
12. Yajirobe is accompanying the group and is hungry and angry.
13. Gohan is concerned about his father, Goku, and wants to check in on him.
14. Piccolo suggests that the group should stick together for safety.
15. Tien suggests that the group should split up to cover more ground.
16. Android 17 and 18 decide to kill the Z-Warriors instead of following Dr. Gero's orders.
17. Dr. Gero is killed by Android 17.
18. The Z-Warriors are unaware of the danger that Androids 17 and 18 pose.