The use of the term “data” tends to conjure up dry rows of numbers rather than the close contact with emotions, fantasies, and impulses that is often part and parcel of Tavistock group work. This section aims to examine the types of data that the Tavistock consultant may use, examining situations that may lead to overwhelming floods of data and deserts of absence of data. Finally, ways of coping with data floods and droughts will be suggested. A thread running through this will be the openness to data that comes from ideas beyond the traditional frame.