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.
From Family Photos/CNN
John Stillwell/Royal Family
Russian Federal Space Agency
iStock / rojoimages
It's easy to upload your photos and/or videos on News8000.com. Once you do, we'll share your upload with the community!