Available now on major streaming services, the “2025 mix” of “Free as a Bird” uses the same advanced demixing technology that allowed the surviving Beatles — in collaboration with Giles Martin, the son of their 1960s producer, George Martin — to finish off a long-lost third reunion track, “Now and Then,” and release it in late 2023.

The Beatles have unearthed and refreshed the "Anthology" series for its 30th anniversary. Here's what is new to watch and hear.