If a star passes too close to the supermassive black hole in the center of its galaxy, it can be destroyed by tidal gravity and will subsequently accrete onto the black hole to produce an electromagnetic display. I will give an overview of the Medium Deep Survey of Pan-STARRS1, which was a recently concluded five-band survey of ten 7 sq. deg. fields to a nightly depth of 23.5 mag. We discovered more than 5000 optical transients in the 4+ years of the survey, which has allowed us to search for rare or novel events, including tidal disruption event (TDE) candidates. These events have the basic observational signatures expected of TDEs, but the theoretical interpretation of the emission remains challenging. In particular, the optical photospheres are substantially larger and cooler than expected for emission from an accretion disk formed at the tidal radius, which has led us to invoke reprocessing by unknown material at larger radius. If the optical emission and light curves can be interpreted correctly, TDEs have the promise of teaching us about the demographics of otherwise quiescent black holes in distant galaxies and about black hole accretion under different conditions than in steadily accreting quasars.