Who these guests will be and what role they will play is a mystery that has stoked an atmosphere of feverish, and occasionally outlandish, speculation.

会有那些客人呢？还有他们将扮演什么角色，这个神秘点燃了一个热情、偶然带着古怪和揣测的气氛。

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But McColl and the rest of the company are fiendishly tight-lipped about the mystery guests who will be giving the UK some sunshine.

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For an hour, listeners can play along as Eisenberg puts questions to a rotating band of puzzle gurus, audience members and special mystery guests, who then takes a turn in the contestant's chair facing trivia games written especially for him or her.

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With the mystery unexplained, the Hyatt tried to give its guests a sense of security by posting a guard in its lobby.

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