I've only been able to watch Part 1 so far, Steven, but my thanks as well! It's fun to be amongst other fans of the great man!
Of 4 famous Davids in Italy, Bernini's is by far my favorite. It takes a very rare talent to create the sort of lifelike energy, movement and expression he coaxed from cold stone! Michelangelo's pieces look pretty static by comparison.
LOL, this might be covered in one of the other parts but St. Theresa at Santa Maria Della Vittoria? The audience of male members of the patron Cornaro family - and possibly a half-hidden head of the artist himself - looking on from the sidelines comes off as a goofy bit of sacrilegious voyeurism. His "Beata Ludovica Albertoni" at San Francesco a Ripa is also afflicted with the same throes of, er, something as Teresa. Giovanni Maini must have found that one inspiring as, if you run over to Sant'Andrea Della Fratte (2 Bernini angels originally meant for Ponte Sant’Angelo are there), you can see a blatant copy in his sculpture of a dying St. Anne. :O)