Evidence from lesion, imaging and neuroanatomical studies implicate the cerebellum in high-level functions such as timing, prediction, and working memory in addition to its major contribution to motor control. Remarkably little is known, however, about non-motor signals conveyed by circuits in the lateral cerebellar cortex. Recent results from our team (Ashmore and Sommer, SfN 2009, 2010) revealed long-lead, pre-saccadic activity in a majority of neurons in the caudal dentate nucleus (cDN). We studied the paradox that known properties of cerebellar cortex neurons cannot explain saccade-related long-lead cDN activity.