In a special edition of Immunity, focussed on the tumour immune microenvironment, Prof Pollard and Dr. Esra Güç publish an article entitled Redefining macrophage and neutrophil biology in the metastatic cascade. The cover image depicts the various roles of macrophages, neutrophils, and their progenitors in the metastatic cascade, drawn by current and ex-members of the Pollard lab.