My research interests include the physics of radio galaxies, together with associated cool and ionized gas and the hot intracluster medium, specifically the formation and evolution of radio sources and their interactions with surrounding gas. One of my recent projects has involved studying the complex network of filamentary emission around the radio lobes of the central radio galaxy in the cooling-flow cluster Abell 2597. This object displays remarkable `blue lobes' of optical emission coincident with the radio lobes; new HST WFPC2 images fully resolve this emission and suggest that it may be due to regions of intense star-formation, possibly triggered by the expansion of the radio lobes into the ambient gas.