Dr. Craig is a liar.

[Jehanne]

Your claims about modern evolutionary theory are just false; evolutionary theory has made innumerable and testable claims, such as the existence of transitory fossils.  You can test evolutionary theory whenever you want, just by going out to areas of exposed rock from certain geologic periods.  If you find a fossil of an animal or plant that did not exist in that epoch, then, "Voilà!", evolutionary theory has been falsified.  Of course, individuals have made such claims, only to be refuted later on.

As for the "all repeatable evidence...and a beginning of the universe," some cosmologists hold to this, but not all.  Here is a recent paper that demonstrates a beginning-less and endless Universe:

http://arxiv.org/abs/1404.3093v3

So, no, the door is not yet closed.  I realize that Alexander Vilenkin has argued for a Universe with a beginning, but even he holds to the possibility of a multiverse:

https://arxiv.org/abs/1512.01819

Can they prove that they are transitional, in a repeatable demonstration?

Through DNA evidence, yes, absolutely.  If you, as a "Reformed Christian", are willing to sentence someone to death based upon DNA evidence, why aren't you willing to accept that same evidence as showing "common ancestry" with respect to other organisms on the planet?