  Tidal disruption events (TDEs) observed in massive galaxies with inferred
central black hole masses $M_h > 10^8 \ M_\odot$ are presumptive candidates for
TDEs by lower mass secondaries in binary systems. We use hydrodynamic
simulations to quantify the characteristics of such TDEs, focusing on extreme
mass ratio binaries and mpc separations where the debris stream samples the
binary potential. The simulations are initialised with disruption trajectories
from 3-body integrations of stars with parabolic orbits with respect to the
binary center of mass. The most common outcome is found to be the formation of
an unbound debris stream, with either weak late-time accretion or no accretion
at all. A substantial fraction of streams remain bound, however, and these
commonly yield structured fallback rate curves that exhibit multiple peaks or
sharp drops. We apply our results to the superluminous supernova candidate
ASASSN-15lh and show that its features, including its anomalous rebrightening
at $\sim 100$ days after detection, are consistent with the tidal disruption of
a star by a supermassive black hole in a binary system.
