Apollo 33 was an Apollo mission spacecraft which was launched at some point in the 21st century, a distant successor to 2010's Apollo 23. (PROSE: Apollo 23) It was followed by Apollo 34, which launched in 2056. (TV: The Waters of Mars)
To the best of his memory, the Eighth Doctor recalled that a trio of spacesuits, deprecatingly referred to by Cardinal Ollistra as "Bronze Age", within his TARDIS were acquired from either Apollo 32 or 33. (AUDIO: Day of the Vashta Nerada)