My Favorite Martian (1963) : 1x20

Martin wants to help Tim with the household expenses, and without a money earning activity, decides to sell art he's currently painting to relive boredom. Martin can paint in the style of any famous artist. Mr. Green of the Green Gallery notices Martin's first piece is just like a Van Gogh, and eagerly takes and sells it. As such, Mr. Green commissions Martin to paint some more and they sell as quickly as Martin gets them to the gallery. Mr. Green wants to have a showing of Martin's work. When Tim mentions that this might not be a good idea as it may raise questions about Martin himself, Martin offers Tim up as the true artist of the paintings. At the show, Mr. Bentley, the art expert brought in the evaluate the show, is skeptical that Tim painted all the paintings, since they are all in different styles. Mr. Green suggests that Tim provide a real life demonstration of his painting process. Martin assures Tim that with his help, he can indeed paint. However, when Tim's demonstration is supposed to start, Martin has an allergic reaction which is affecting his Tim-assisting painting finger. Martin has to find out what he's allergic to and get rid of the item. Tim is nervously on his own until Martin finds the allergy inducing source. Martin discovers the source is a corsage worn by Mrs. Bentley. Martin manages to get rid of the corsage, and Tim, with Martin's help, proceeds with his painting demonstration to great fanfare. Mr. Bentley deems Tim a major art talent. However Martin announces that Tim has given up on emulating the masters, and will strike out as an artist on his own merit and own style. As such, Tim is a failure. Tim's art career is over, much to his relief.