When?

[Barry Arrowsmith]

No: HPFGUIDX 118605

A question I've asked before - not only that, it's a question
that was asked long before I joined the site - that hasn't
received a convincing answer. Maybe some of the newer
members can come up with an idea or two.

GoF chap  34 (in the graveyard):

...said Voldemort softly. "Answer me! Imperio!"
And Harry felt *for the third time in his life*, the sensation...
(my emphases).

Third time?
Does not compute.

Crouch!Moody put Harry through his paces "four times in a row" and 
Voldy makes five.

If you  take occasions rather than the number of spells, then I can 
only  count two (the Unforgivables lesson, the graveyard).

Alternatives:
1. It's a "flint",
2. Sometime either during the four books up  to  the end of GoF or even 
sometime before PS/SS starts, Harry has been Imperioed without it being 
obvious ( or mentioned) to us.

Suggestions sought.

Kneasy