Going on a Diet!

Bob Newhart vows to eat nothing but water, Old Christine breaks down the science of the protein shake, and my sister Sam takes on body-shaming in a mildly special episode... This week's trope is Going on a Diet!
Here's what we're watching:

• The Bob Newhart Show S2 E11 "The Fit, the Fat and the Forty One"
• Gimme a Break S1 E5 "Do or Diet"
• My Sister Sam S1 E8 "Mirror Mirror on the Wall"
• New Adventures of Old Christine S4 E20 "He Ain't Heavy"