Originally Posted by codename_47:
“Judging by the end of the Pond's last episode, you can cry, weep, close your eyes in despair, have a consoling hug and eventually retreat into the tardis and the angels still won't touch you so.....maybe they're not that big a threat after all....”
Until Rory actually got sent back in time by the angle, it must have just been on its way over unnoticed.
After that I think it was watched by Amy, River and the Doctor (River and the Doctor being a little way away but could still see Amy and the angel well enough).
Amy then later turned her back and it hid the angel from River and the Doctor momentarily while she was also zapped back in time, then River and the Doctor could see the angle and they just went into the TARDIS.
So except for the moments when Amy and Rory were zapped back in time, the angle was watched from the point they knew about it, till River and the Doctor stepped into the TARDIS.