What is the fine-grained topic of the following text: Legend has it that, back in late 1964, Jim Henson and his Muppet troupe (performer Frank Oz, puppet builder Don Sahlin, and writer Jerry Juhl) were booked for a guest-spot on Tonight Starring Jack Paar. Only return the topic.
Jim Henson and his Muppet troupe's guest-spot on Tonight Starring Jack Paar in 1964.