Changes

{{Infobox/Yu-Gi-Oh!/Episodeepisode | series = Yu-Gi-Oh! 5D's | season image = 1 | image name = YGO5Ds040.png | image size = | image caption = | english en_name = Clash of the Dragons, Part 1 | kanji ja_name = 戻れない過去 閉ざされた心の扉 | ruby japanese = | romaji romaji_name = Modorenai Kako Tozasareta Kokoro no Tobira | japanese translated ja_trans_name = Irreversible Past, A Locked Heart's Door | episode number series = 40Yu-Gi-Oh! 5D's | japanese air date number = January 7, 200940 | english air date season = August 17, 20091 | japanese opening ja_opening = [[Last Train - The New Morning]] | japanese ending ja_ending = [[CROSS GAME]] | english opening en_theme = [[Hyper Drive]] | english ending animation_director = [[Hyper DriveIchizou Kobayashi]] | featured card = Evil Thorn | animation director = [[Ichizou Kobayashi]]| ja_air_date = January 7, 2009| en_air_date = August 17, 2009| featured_card = Evil Thorn (anime)