In June 2014 (4th-6th) Bill Watterson was the (unexpected) guest artist for “Pearls Before Swine”

You can tell which parts of the middle 3 strips that BW did.
The first strip was the set-up strip and the last strip was a tribute to the December 31st, 1995 FINAL “Calvin & Hobbes” strip (😢). BW does the “action sequences” in the middle 3 strips.

Really?

Yep. I only found out about it recently. The full story is on Bill Watterson’s Wikipedia page. In the “After Calvin and Hobbes” section.

BW didn’t do any of the artwork on the 1st and last “PBS” strips. Just the middle 3.

How interesting!

I thought so as well. 😁