Steve on This Old House... as a child it bothered me to no end to have him asking the same questions to the other folks over and over again (and that they'd cast "an idiot" instead of another Bob Villa or letting Norm take it over) until I realized that asking the questions was the point...

(Then he hosted the show for what 20 years himself and they had to hire someone new to host because he wasn't believable anymore because by that point he had to know most of what he was asking about by that point)

• DVD example- Yeardley Smith often is this when she's on The Simpsons commentaries.

Does this really count?

I know this has been renamed twice, but why not just call this Audience Surrogate?