How about a head of lettuce.
Worked for David Frost once.

The show needs no host. The guests show up with the week's talking points and run thru them regardless of the question (a media training goal, I might add) so just let them line up, approach the mic and let rip. Next in line follows... asst producer keeps them to tigth time limits.
Voila! Another 30 minutes of puntificating history.

No need to thank me.

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Sorry, " tight" schedule, it should read.
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