Mental illness in old age is one of the most important healthcare issues of our times: if dementia were a country, it would be the world's 18th largest economy (Alzheimer's Disease International, 2010). In 1989, the UK Department of Health formally recognized old age psychiatry as a specialty in its own right, and by 2010 it had come of age. This anniversary was commemorated with a special edition of Old Age Psychiatrist, the newsletter of the Royal College of Psychiatrists, Faculty of Old Age Psychiatry (2011). To produce this, we called for “Janus” articles drawing on past experiences and giving thought to the future. Thirty-seven authors, ranging from students to retired colleagues, responded. Most contributors were UK-based but five worked elsewhere and provided an international perspective. The majority were psychiatrists who had devoted many years to the specialty, but their thoughts were set in context by representatives from other disciplines closely aligned to specialist healthcare services for mentally ill older people.