Evolution of the filament as observed by selected SDO/AIA channels and by KSO in Hα at six times (columns). Top row: AIA 131 Å images, filament contours extracted from the AIA 304 Å channel, and AIA 1600 Å contours overlayed on HMI LOS magnetograms, scaled to ±1000 G. The positions of the filament footpoints are marked on the AIA 304 Å images. The associated movie is available online.