This lecture covers the Swiss energy transition, analyzing the electricity demand and supply in 2011, the impact of nuclear power absence, Switzerland's role in the European electricity network, long-term contracts with France, the situation of the French and German electricity systems, electricity prices evolution, and the challenges faced by Switzerland due to import dependency and nuclear phase-out. It also discusses the European carbon price decline and the Italian electricity situation. The lecture emphasizes the need for significant efforts in Switzerland to meet future energy challenges.