Hα+[N II] image of the multiphase filamentary structures east of the nucleus of M87, constructed from archival HST-WFPC2 images as described in Sect. 6.2. The red circle in the center of the image indicates the location of our COS aperture, which targets the northern of two large filaments projected east of the nucleus. This filament is clearly separated from the other filament to the south, as there is no Hα bridge connecting the two filaments, and as we will show they have different velocities and likely originate on opposite sides of an expanding radio lobe. The dashed red box indicates the approximate size of the Herschel-PACS region from which we measure a [C II] 158 μm spectrum (see, e.g., Sect. 2.1). Comparison of this image to Fig. 2 of Werner et al. (2013) shows that the hot ICM in this sightline is multiphase and rich in 1 keV plasma, although the majority of the hot gas is in the slightly hotter 2 keV phase.