Nerida Campbell is an historian with an interest in criminal and deviant history including the treatment of women in criminal histories. Nerida is curator of the Sydney portfolio for Sydney Living Museums where her current Underworld exhibition includes images from the the 'Specials' collection of the NSW Police Forensic Photography Archive: a series of unique and candid mug shots of suspects in custody taken between 1920 and 1930.

Dr Lynette Riley is a Wiradjuri and Gamilaroi woman from Dubbo and Moree with a long career as an educator. Lyn is currently a Senior Lecturer in the Sydney School of Education and Social Work at the University of Sydney. Her doctoral research looked at conditions of academic success for Aboriginal students. Lyn has experience as a teacher and in Aboriginal education and administration within primary schools, high schools, TAFE, state offices and universities. Lyn is also a member of the National NAIDOC Committee.

A celebration of sad songs with music aficionado Angus Huntsdale. Angus explains the appeal of listening to sad songs and shares some of his favourites by Perfume Genius, Dirty Three, Elliott Smith and Weddings Parties Anything.

A conversation about the study of architectural history as an interdisciplinary pursuit combining art history, intellectual history and visual culture. Deborah Ascher Barnstone is a professor of architectural history and architectural design at UTS and a licensed architect and principal with Ascher Barnstone Architects. Deborah's latest book is titled, The Break with the Past: Avant-Garde Architecture in Germany, 1910 – 1925

Reviews of five movies you can watch at home this Easter holidays each with appropriate themes for the season

Ecologist Dr John Martin from the Royal Botanic Garden Sydney discusses some of the history and benefits of citizen science which involves public participation in research projects. John also shares advice for individuals interested in studying ecology and thoughts on intervention research methods such as trapping animals for study and tracking.

Dr Ooi Kee Beng is Executive Director of the Penang Institute which is a major public policy think tank in Malaysia. Dr Ooi explains some of the political history of Malaysia in relation to global history and international order and by critically analysing concepts of colonialism, nationalism and regionalism. Dr Ooi is an accomplished academic and author and his public commentary can be found at Wikibeng.com

Lucy Haslam has been a leading advocate for patient access to medical cannabis since witnessing the relief her son Dan got from using cannabis when he was terminally ill. Lucy has been at the forefront of a movement to introduce medical cannabis in Australia and continues her work due to inadequacies of the current system.

More about developments in cannabinoid science as a follow on from a previous discussion about medical cannabis. Professor Iain McGregor is Academic Director of the Lambert Initiative for Cannabinoid Therapeutics which is part of the Brain and Mind Centre at the University of Sydney. As well as explaining the human endocannabinoid system and the potential medicinal uses of various components of cannabis plants, Iain comments on the current regulatory approach to medical cannabis in Australia.

Broken Hill is a mining town in outback Australia. The red dusty landscape of its surrounding regions has been a backdrop for numerous films including Mad Max 2 and Priscilla Queen of the Desert. It is the only heritage listed city in Australia and a place with a thriving arts scene. Locals Andrea Roberts and Bonnie Fitzpatrick share their knowledge of Broken Hill's history and culture and memories of growing up there.