6x28 - Dragon Ball Z: Dragon Box

Trunks launches a surprise attack on Boo, and then, with Goten's help, manages to rescue Vegeta! Meanwhile, although Piccolo is able to defeat Babidi, Boo shows no sign of taking any damage. There is only one way to defeat him. Having made his resolve, Vegeta knocks out the young pair and asks Piccolo to carry them away to a safe location...