BBC Video: The Big Questions: Is There Life After Death?
Is he who prays devoutly to God in the hours of the night, prostrating himself and standing, and fears the Hereafter and hopes for the mercy of his Lord, like him who does not do so? Say, ‘Are those who know equal to those who know not?’ Indeed, only those endowed with understanding will take heed. (Al Quran 39:9/10)
Suggested reading and viewing:
The two fundamental beliefs in Islam are belief in one God and accountability in the hereafter. The materials linked above provide a good defense for both, by the Grace of Allah. Incidentally, the Muslim Times also has the best collection on the theme of interfaith tolerance!