My Favorite Martian (1963) : 1x15

The stupidest idea Martin has heard of since he's been on Earth: Rosemary Willis leaving her cat, Max, $650,000 in her will. Morton Beanbecker, the lawyer for the estate, is threatening Tim with a lawsuit if he continues to editorialize about the stupidity of the will and deceased Rosemary Willis. However, Beanbecker also mentions that Mrs. Willis wrote a subsequent will leaving her estate to a children's orphanage, that will which was either never signed or hidden. Martin reads his mind that he really wants the second will to be found despite his threatening words to Tim. Tim and Martin find out that Max's trustees are Rosemary's sister, Aggie, and Aggie's husband, Charles. As Aggie and Charles are lavishing money on Max and themselves in the process, Martin and Tim think Aggie and Charles hid the second will. However Max tells Martin himself that he is miserable with all the money, and it was he himself who hid the second will only because Rosemary did forget to sign it. Max leads Martin to the will. Beanbecker and Martin pour through legal books to find precedent to overturn the first will, without success. As Aggie says she hears from Rosemary in her sleep, they decide to hold a séance, where Rosemary - really Martin - will tell Aggie that she wants the money turned over to the orphanage. The ever obliging younger sister Aggie does as she's told.