My Nephew the Artist

S1 E20: In his efforts to help Tim (Bill Bixby) pay his household expenses, Uncle Martin (Ray Walston) tries to raise money by creating paintings in the exact styles of such famous artists as Van Gogh. The plan backfires when it is Tim, rather than Martin, who is lauded as an artistic genius--and as a result, Tim is coerced into giving a public demonstration of his painting process! (Richard Deacon of The Dick Van Dyke Show fame makes his second My Favorite Martian appearance, this time in the role of a wealthy art patron).