By revealing his identity as'John Smith', Kyon manages to convince Haruhi to believe his story, and with her assistance they gather the SOS Brigade together, thus bringing the keys neccessary for a program built by alien Yuki.
By revealing his identity as'John Smith' (his alias when he first travelled back in time and assisted a young Haruhi), Kyon manages to convince Haruhi to believe his story. With her assistance they gather the SOS Brigade together, thus bringing the keys neccessary for a program built by alien Yuki.