[O III] map (top-right) and integrated spectra of the dual AGN system and a faint clump associated with Jekyll & Hyde. The [O III] map is obtained by integrating the line emission over specific velocity ranges (as labelled), in order to highlight the primary (Eastfield, AGN-A) and secondary (Mr West, AGN-B) nuclei, together with additional structures at the same redshift of the active galaxies. The remaining panels show the integrated spectra of the primary (top-left) and secondary (bottom-left) AGNs, as well as of a compact clump between the two brightest sources (bottom-right). The legend display the individual Gaussian components and best-fit curves shown in the spectra. Residuals, defined as the difference between the observed data and the best-fit model, are displayed at the bottom of each panel, with grey shaded regions indicating the average ±3σ uncertainties on the data. The vertical shaded areas at ∼5007 Å mark the channels used to generate the [O III] three-colour map.