It is beyond the scope of this course to take on an in-depth discussion of the existence of God.  However, many good resources are available, including:
Apologetics Press
Christian Courier

Thomas Warren took part in a number of significant debates regarding the existence of God.

Video of Warren-Flew debate (Eight hours/1976)
Printed copies of the debate are available from National Christian Press.

Anthony Flew no longer believes that there is no God: There Is a God: How the World's Most Notorious Atheist Changed His Mind