I am trying to remember an episode of the 11th Doctor Who when Rory and Amy were his companions. I've tried looking through episode summaries in the TARDIS Data Core wiki but can't seem to find it.
In the episode, Amy and Rory are split up - they are either on the Tardis or on another ship, I think. Amy comes upon Rory, who has aged and looks very disheveled - dirty, ragged clothes, long unkempt hair and beard. He is crazy and thinks Amy is a hallucination or something. When he realizes she is real, he freaks out about how long he waited for her and tries to choke her but Amy is able to get away. Anyone know what episode this was?