The dealers fight it out over a punchbag owned by Muhammad Ali, a Bee Gees guitar, some giant angel wings, a unique armchair and a mysterious portrait painting with a six-figure price tag.

Can a solid silver American football helmet, a Rolling Stones LP signed by Andy Warhol or a full-size replica Back to the Future car earn their owners big money?

Gordon Watson, Celia Sawyer, Alex Proud and David Sonnenthal play mind games over a retro arcade machine, and are enthralled by a rare collection of Tolkien first edition books.