Did you hide the keys for "safe-keeping," Captain? Were you a little, um, drunk when you did so? They could be anywhere I suppose, but I remember you used to hide things in your socks.
You didn't give Ducky a sock with the key in it, did you? I'll ask her to look. If we find it, I'm going to have a copy made because I think this is the sixth time you have lost the key.

At least!