You were totally close! I didn't get anywhere near that close the first time I read it. I have to admit, thinking back, it is kind of hilarious that the MYSTERIOUS CHARACTER turns out to be Prince Justin every time. I think by now it counts as a trend along the lines of Buffy dying or the Daleks mysteriously surviving - if a stranger shows up with memory loss, it's totally Prince Justin.

Ack! Sounds like cat was possibly having fun doing . . . something mysterious, at least?