It's here. The fifth and final chapter in Billy's accolade to his favourite sport. Why did New York's two biggest baseball teams up sticks and leave their hometown, their communities, their diehard fans, and head west? The momentous move in 1958 was a reflection of a wider cultural shift that was going on in the US at this time, says this week's guest Josh Chetwynd, who's back for a final time.

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