Someone knocking at the door. Somebody ringing the bell. Someone's knocking at the door. Somebody's ringing the bell. Do me a favour. Open the door
"Let 'Em In" is a song by Wings from their 1976 album Wings at the Speed of Sound. between friends and relatives of McCartney who, without a justified reason, knock on the door or ring the bell of his house and he exclaims "Let 'Em In".