[masaegu]

サスケ君は私が助け出してみせる!

This sentence is not easy to translate into English in one sentence because of the verb compound at the end. Technically speaking, 助け出してみせる consists of three verbs!

But I actually think that both of your friends did a pretty good job. The sentence means "I will get Sasuke-kun out of trouble. I will show it to you."