May 31

What happened today on May 31 back in...

1969

 * "Tooly's Surprise," the seventeenth and final episode of The Three Musketeers, premiered on NBC.

2004

 * In the United Kingdom, Warner Home Video releases Scooby-Doo! and the Loch Ness Monster on VHS.
 * In the United Kingdom, Warner Home Video releases Scooby-Doo! and the Loch Ness Monster on DVD.

2021

 * In the United Kingdom, Warner Home Video releases Scooby-Doo! and Guess Who?: The Complete First Season on DVD.