ADHD - or attention deficit hyperactivity disorder - tends to be characterised by difficulties in concentrating, impulsivity, and hyperactivity. Claudia Hammond talks to Philip Asherson, Professor of Clinical and Molecular Psychiatry at Kings College London and a consultant at the Maudsley Hospital in London, who has recently published research that shows that excessive mind-wandering might be at its core. She also hears from two teenage girls with ADHD about their experience of mindwandering during school lessons. it's not at all unusual for people with depression to have difficulty sleeping. Now a trial has focussed on treating the insomnia in the hope that it improves the depression, rather than vice versa. Professor of Mental Health, Helen Christensen, and Dr Aliza Werner-Saidler, a Research Fellow and Clinical Psychologist at the Black Dog Institute at the University of New South Wales in Australia, showed Claudia Hammond how an online programme called SHUTi - developed by the University of Virginia and commercially available - helped people with insomnia and depression. Two years ago on All in the Mind we debated the merits of a new scheme to get more high-flying graduates into the mental health field. Called Think Ahead it follows in the footsteps of similar schemes like Teach First. This time top graduates train, mostly on the job, to become mental health social workers. Claudia finds out how two of the first graduates are getting on in the their first placements.