[s4e4] Alternative History Of The German Invasion -

: After failing to register for "The History of Ice Cream," the group joins a European History class taught by Professor Noel Cornwallis. They discover that a group of German students has "invaded" their regular study room, leading to a territorial dispute.

: Fans pointed out a significant break in continuity during a flashback to the Season 2 episode "Cooperative Calligraphy". The flashback shows them refusing Leonard entry during the search for Annie's pen, despite the original episode stating the school was empty due to a "puppy parade". [S4E4] Alternative History of the German Invasion

The episode is notable for receiving largely negative reviews from critics and fans alike. : After failing to register for "The History