The Battle Turns for the Worst! Cell Attacks Android 18! (「そして最悪の事態へ…セル、１８号に襲いかかる！」, Soshite Sai'aku no Jitai he... Seru, Jūhachi Gō ni Osoikakaru!; lit. "And So the Situation Takes a Turn for the Worst... Cell Attacks #18!") is the seventy-ninth episode of Dragon Ball Z Kai. Its Japanese air date was October 31, 2010. Its American air date was August 4, 2011.
Cell successfully persuades Vegeta to let him find and absorb Android 18, but Future Trunks is determined to prevent this and delivers his own beating to Cell. During a break in the action, Cell spots the Androids and Krillin, who are distracted by their own awkward meeting.
Vegeta attempts to keep Trunks from interfering, forcing Trunks to attack his own father in order to prevent him from allowing Cell to reach his perfect form. While this is going on, Cell is savoring the moment and leisurely going about picking off Android 16 and Krillin. Despite their best efforts and a sound beating from Trunks, Cell is ultimately able to blind everyone via the Solar Flare, absorb 18, and achieve his perfect form.