  We consider the time-reversal odd dynamics of the bilayer graphene at low
energies in the quantum Hall regime. A generating functional for the effective
action that captures the electromagnetic response to all orders in momentum and
frequency is presented and evaluated to the third order in the space-time
gradient $\mathcal O(\partial^3)$. In addition, we calculate the Hall viscosity
and derive an explicit relationship with the $q^2$ coefficient of the Hall
conductivity. It is reminiscent of the Hoyos--Son relation in the Galilean
invariant systems, which can be recovered in the limit of large filling factor
$N$.
