Take a look back at some of the more memorable casting changes in the history of television.
To fill the hole, Don Knotts was added as goofy new landlord Ralph Furley, who seemed to have a knack for walking in on Jack Tripper in compromising situations.
Library of Congress
Boy Scouts of America
JASON REDMOND / Reuters
iStock / amete
iStock / LawrenceSawyer
It's easy to upload your photos and/or videos on News8000.com. Once you do, we'll share your upload with the community!