Col. Blake asks the actor playing Gen. Grant to play along with Granny so that the Civil War movie can continue. Meanwhile, Jethro uses his 6th grade education to take the written test to enter the Reserves.

Granny competes against Mrs. Drysdale as artists and tells Jed about her uncle the barn painter. Jed and Jethro go to an upscale gallery to buy a painting but are mistaken for gardeners. Bessie the chimp dabbles with a paintbrush.