The Luminous Fish Effect

Summary
Sheldon offends the new department head at the University and gets fired. He begins adopting a new obsession each day and refuses to leave the apartment. Leonard calls Sheldon’s mother who comes to stay. She forces him to go and get his job back.

Critics
"A strangely written episode. The story is passable as are the jokes but the focus is all wrong. The story should be about Sheldon’s place in the world and how he feels about it and yet we learn very little. The writers don’t seem to know what they were trying to achieve." - The TV Critic's Review