  We present results from 30 nights of observations of the open cluster NGC
7789 with the WFC camera on the INT telescope in La Palma. From ~900 epochs, we
obtained lightcurves and Sloan r-i colours for ~33000 stars, with ~2400 stars
with better than 1% precision. We expected to detect ~2 transiting hot Jupiter
planets if 1% of stars host such a companion and that a typical hot Jupiter
radius is ~1.2RJ. We find 24 transit candidates, 14 of which we can assign a
period. We rule out the transiting planet model for 21 of these candidates
using various robust arguments. For 2 candidates we are unable to decide on
their nature, although it seems most likely that they are eclipsing binaries as
well. We have one candidate exhibiting a single eclipse for which we derive a
radius of 1.81+0.09-0.00RJ. Three candidates remain that require follow-up
observations in order to determine their nature.
