Abstract: The precise measurement of the unitarity triangle angle $\gamma$, also known as $\phi_3$, is a key goal of current and future flavour facilities: Belle II and LHCb. Quantum correlated measurements of $\D^{0}\overline{D}^{0}$ pairs produced in $e^{+}e^{-}$ collisions at the $\psi(3770)$ resonance play an essential role in these measurements of $\gamma$. This seminar will introduce these measurements then review their past history at CLEO-c and their future at BESIII.