The course Fails in Physics explores the role of mistakes, misconceptions, and accidents in the advancement of physics. Failures have often paved the way for groundbreaking discoveries and paradigm shifts. This course invites you to reflect on and understand different cases when things did not go according to plan and how these "wrong turns" ultimately shaped physics. Through case studies of accidental discoveries, flawed hypotheses, and controversial claims, we get insight into the scientific method as a dynamic process where disproving ideas is as valuable as confirming them. The course emphasizes critical thinking, historical context, and ethical considerations, encouraging students to embrace curiosity and openness in your research journey. Outline for the course: Independent study, guided mentorship, and peer discussions. Each student will analyse a chosen case in depth, present their findings, and reflect on the lessons learned.