Depression remains the leading cause of disability worldwide, affecting almost 300 million people; half of whom can't find lasting relief from drugs or therapy. As Lee Cowan reports, a new experimental treatment using a fast-acting approach with targeted magnetic stimulation, called SAINT (Stanford Accelerated Intelligent Neuromodulation Therapy), has achieved significant success in trials. With electric cars seen as the future of the American auto industry, companies are ramping up the production of batteries, which require lithium. Ben Tracy looks at efforts to increase lithium mining in the U.S., and the struggle over its environmental costs. Bob Costas, a longtime fixture of sports and Olympic TV coverage, is bringing his passion to a new HBO discussion show, "Back on the Record with Bob Costas." The veteran broadcaster and commentator talks with Jim Axelrod about examining the junctions of sports and culture. A son of working actors, Benedict Cumberbatch rocketed to worldwide fame in the BBC series "Sherlock," and to the heights of the Marvel Cinematic Universe as Doctor Strange. Now, the Oscar-nominated actor is being praised for his performance as a bullying cowboy in Jane Campion's psychological drama, "The Power of the Dog." He talks with Tracy Smith about filming a period western, family, and gratitude for a stellar career. Those stories and more on this week's "CBS Sunday Morning," with host Jane Pauley.