Thanks
I've heard that the following process works:
1. Do quick channel-surfs of the show every minute or so,
2. If you see Stossel, stay with it. If not, flip back to whatever else you were watching.
3. When Stossel is done, change the channel back to whatever else you were watching and leave it there.
Just do what I do, read a book and look at the reflection in the window with the volume off until you see John.