As far as the Christian missionaries are concerned, nothing is spared that is related with Islam, whether it is the Qur'an or the ḥadīth or anything else. Everything needs to be attacked. This page deals with the refutation of the claims of the Christian missionaries and others about the ḥadīth.
Science Of Ḥadīth
Ḥadīth & Its Origins
This is a lecture given by Dr. Jonathan Brown, a young, eloquent western ḥadīth scholar at University of Washington where he works as an Assistant Professor. In this lecture, he briefly discusses the history of ḥadīth collection, its criticism and the evolution of western ḥadīth scholarship from Goldziher, Schacht, Juynboll to Motzki. A lot of misconceptions about ḥadīth are clarified in this lecture.
sumber : http://www.islamic-awareness.org/Hadith/