Does anyone know which guest as appeared the most?

[superdeluxe]

Ed Dames?  Richard Hoagland?  Phil Plait, Michio Kaku

[EvB]

Ed Dames?  Richard Hoagland?  Phil Plait, Michio Kaku

If you count all the times Hoagland comes on just for a few to do some marketing, or try another of his scare tactics - or brag on himself - I'd say it had to be him. 

[MV/Liberace!]

If you count all the times Hoagland comes on just for a few to do some marketing, or try another of his scare tactics - or brag on himself - I'd say it had to be him.

agreed.