Dear Daryl,
As to ''empirically verified and verifiable theories'', I'm afraid that big bang cosmologists confuse observations with interpretations of observations.
Most physicist seem not to be troubled by the fact that their cherished theories are riddled with contradictions and infinities, at least not so much as to even consider that predictions they arrive at may be wrong because of these problems.
Big bang hypothesis doesn't even offer a beginning of an idea about the origin of all matter and energy created: as it cannot explain the observed isotropy and homogeneity of the universe, nor why, despite gravity between galaxies, its expansion doesn't slow down in time, it is a source of new far-fetched, artificial, ad hoc hypotheses like inflation and dark energy.
I'm afraid that BBC describes a fictitious universe: if these hypotheses seem to paint a consistent picture of our universe, then this isn't because they are true but because they are designed, crafted to fit observations instead of following from first principles, because they are based on the same conceptual error.
This is in contrast to a self-creating universe (see my essay) which has no such problems, no crippling contradictions and infinities.
Anton