Knock Knock
G · 1940 ‧ Comedy/Animation ‧ 7 mins
Initial release: November 25, 1940
Directors: Walter Lantz and Alex Lovy
Distributed by: Universal Pictures
Animation by: Alex Lovy; Frank Tipper; Les Kline (uncredited); Laverne Harding (uncredited)
Story by: Ben Hardaway; L.E. Elliott