History of science and philosophy of science have experienced a somewhat turbulent relationship over the last century. At times it has been said that philosophy needs history, or that history needs philosophy. Very occasionally, something entirely new is said to need them both. Often, however, their relationship is seen as little more than a marriage of convenience. This article explores that marriage by analyzing the citations of over 7,000 historians, philosophers, and sociologists of science. The data reveal that a small but tightly-knit bridge does exist between the disciplines, and raises suggestions about how to understand that bridge in a more nuanced fashion.