Incoming "Late Late Show" host visits CBS late night on Friday, Nov. 21
Thursday's late-night shows offer cautionary tales, costume tips, trick-or-treat preparation and pumpkin-carving attitudes
"After the first few inches, it's all the same in there," he tells Craig Ferguson on CBS's "The Late Late Show." "So he knows stuff"
CBS isn't just replacing Craig Ferguson with another white guy from the United Kingdom
The "Guardians of the Galaxy" star was disappointed that a long-suffering character didn't get to linger at the death of his greatest tormenter