L’erreur de Petit-Cœur

As the Android from the future tells Piccolo his objective to absorb Androids 17 and 18 to obtain his "Perfect Form", Piccolo regenerates his arm. With his power restored and Krillin and Trunks by his side, Piccolo has a good chance against Cell, but the Android has more tricks up his sleeve. It is revealed that Cell killed Trunks in his future. (Source: Wikipedia)