William H. Bassichis is an American physicist. He has been a physics professor at Texas A&M University since 1970. He is the author of a series of undergraduate physics textbooks titled Don't Panic, which is used by some universities across North America. Before teaching at Texas A&M, Bassichis has done research at the Weizmann Institute of Science, the Centre d'études Nucléaires de Saclay, and the Lawrence Livermore Laboratory. He has also taught at MIT.