I am – Hercules!!

Last week I was talking about my favorite Letterman guests: Steve Martin, Bill Murray, Norm Macdonald, Albert Brooks, Vince Vaughn and Tom Hanks.

They’re coming out of the woodwork as if to help Dave in his time of need. Martin and Vaughn were both on “Late Show” last week, and now we have word that Hanks is making tonight a surprise appearance, presumably to plug the 3D “Toy Story” rerelease.

Scheduled guests tonight are superhot Sienna Miller (“G.I. Joe: Rise of the Cobra”) and comic Aziz Ansari (“Human Giant,” “Parks and Recreation”).

UPDATE (WITH SPOILER!): We now have late word that the clip does not represent Hanks’ only appearance tonight! "The second one is even better," notes our source.

11:35 p.m. Tuesday. CBS.

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