Sheldon and Wolowitz plan birthday celebrations for Amy and Halley, respectively. Also, Leonard receives a Christmas letter from his brother that causes him to spiral out about his own lack of accomplishments.false2018-11-24 18:54:49The Celebration ReverberationMark Cendrowski7.12017TV-14tt6674476642002420ComedyRomancehttps://www.thetvdb.com/banners/episodes/80379/6420024.jpgKevin SussmanGuestStarhttps://image.tmdb.org/t/p/original/zOOZhDHHj4oWH9jOhZrfNs1eWE8.jpgPamela AdlonGuestStarhttps://image.tmdb.org/t/p/original/DbStLMSMhW1qtmKugYjS4yWOi.jpg11112017-12-14subripsubripprogressiveTrueFalse