If the two two-hour episodes ("To Be or Not to Be" and "Daggers") are counted as four one-hour episodes then the total number of episodes would be 59.
ɪf ðə tˈuː tˈuːˈaʊɚɹ ˈɛpɪsˌoʊdz"təbi ɔːɹ nˌɑːt tə bˈiː" ænd "dˈæɡɚz"ɑːɹ kˈaʊntᵻd æz fˈoːɹ wˈʌnˈaʊɚɹ ˈɛpɪsˌoʊdz ðˈɛn ðə tˈoʊɾəl nˈʌmbɚɹ ʌv ˈɛpɪsˌoʊdz wʊd biː fˈɪfti nˈaɪn.