Gohan kills Cell Jr. and Perfect Cell starts singing "Suddenly" by Billy Ocean. He then reveals his plan to kill everyone and is stopped by Gohan. However, Perfect Cell transforms into Semi-Perfect Cell and Gohan is unable to kill him.
Semi-Perfect Cell transforms further, becoming grotesque and threatening to blow up the Earth. Gohan is reluctant to kill him, but Goku intervenes and sacrifices himself to save the world.
After Goku's death, Gohan is devastated and angry. Krillin suggests using the Dragon Balls to revive Goku, and the episode ends with the group contemplating their next move.
Meanwhile, Cell (in a refined voice) sings a song about the extinction of the human race, and Trunks reacts in shock and horror.
Here are the key facts extracted from the text:
1. The scene starts with Perfect Cell fighting Gohan.
2. Gohan is able to overpower Perfect Cell.
3. Perfect Cell tries to use Cell Junior as a hostage, but Gohan is not intimidated.
4. Trunks gives Krillin a Senzu Bean to heal him.
5. Vegeta and Trunks discuss the possibility of becoming a "Super-Dee-Duper Saiyan".
6. Perfect Cell becomes enraged and starts to transform into a more powerful form.
7. Gohan is able to counter Perfect Cell's attacks and gains the upper hand.
8. Perfect Cell's transformation is not fully complete, and he is left in a weakened state.
9. Gohan has the opportunity to kill Perfect Cell but is hesitant.
10. Perfect Cell realizes that Gohan has inherited his explosive temper.
11. Perfect Cell threatens to self-destruct and take the world with him.
12. Goku intervenes and sacrifices himself to save the world.
13. King Kai appears and comments on Goku's sacrifice.
14. Gohan is devastated by his father's death.
15. Krillin suggests using the Dragon Balls to revive Goku.
16. Gohan realizes that he can use the Dragon Balls to bring his father back.
17. The scene ends with Gohan, Krillin, and the others discussing what to do next.
18. Cell is still alive and is singing a song about his plan for revenge.
19. Trunks is shocked and angry at Cell's sudden reappearance.