Create a long detailed text about actor Walter Brennan with the following summary. Stick to the information i give you and dont create new information. Focus only on the Subject name and there following Summary. Subject Name: [Television Career] Summary: [As the film industry started to shift towards television in the 1950s Walter Brennan found success on the small screen he starred in the television series The Real McCoys a country style sitcom where Brennan played the role of grandpa Amos McCoy during the show's six-year run Brennan became somewhat of a television icon bringing the same level of skill to his television work that he had given to the cinema for decades his portrayal of grandpa Amos McCoy was so well received that nightclub impressionists and the general public alike couldn't get enough of imitating every aspect of his character from his folksy accent to his squeaky voice and even his signature limp even after the show's run ended in 1963 Brennan's impact on television continued to be felt and his legacy as a versatile and beloved actor has endured to to this day]

        Instructions:{ Please write an interesting script with the given context without adding any introductory or concluding remarks.
        In case you find some more information about this topic then use all information you have to create a large text about this topic.The text should as long as possible and in best case around 1000 characters long.
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        Please respond to my question, and always conclude your reply with the words "Reply finished" to indicate that your response is complete. 
        Make sure the reply is fully contained before these words and is not cut off prematurely. Thank you.}
         Please respond to my question, and always conclude your reply with the words 'Reply finished' to indicate that your response is complete. Ensure that the text is fully formed without any placeholders such as '[Conclusion]' or '[Placeholder]'. Make sure the reply is fully contained before these words and is not cut off prematurely. Thank you.