The third week of our look at "Get Back".      This time, Martin ("Marv") Quibell of "Pods Like Us" and "P2 Podcast Blues" joins us for George Harrison's departure and eventual return to the Beatles.     (For those playing along at home, the end of Part one, and the beginning of Part two).    Bob and Carol and Ted and Alice?    Try Eric and Charlotte and George and Pattie.