Upper panel: Gaia colour-magnitude diagram of the Hyades with members from Lodieu et al. (2019) compared to isochrones with the same ages as in Fig. 5 and compositions as in Fig. 4. Lower panel: zoom on the giant part of the same colour-magnitude diagram. The positions of the four well-known Hyades giants are marked. Circles indicate their positions when adopting the HIPPARCOS parallaxes. Squares mark the corresponding positions if adopting the Gaia parallaxes.