A picture of the thing under the bed sheet in “Listen”
Now, some propose this is a future version of clara, buuuuuut uh you know, she’s not grey and bald with sunken in eyes. The Silence are. The Silence were to be killed on sight by the humans (and anyone who watched the moon landing), so who would be hiding under the bed? Who would wear a bed sheet so they were never seen? who would beg to be listened to?