In Gavarró & Solà (2004), we present evidence for non-target wh- subextraction in child Catalan and provided an account in terms of Case theory. Our account crucially relies on a specific analysis of the Case licensing strategies available in adult Catalan, according to which Catalan does in fact permit wh-subextraction, although of a more restricted type than that attested in child Catalan. In this paper we aim to substantiate the analysis of adult grammar for wh-interrogatives, drawing from Kayne (2002) and arguing that wh-subextraction in Catalan is an instance of remnant movement. The paper proceeds as follows. First we consider the data on wh- subextraction in the literature, from Romance languages and others, and summarise the original data on child Catalan from Gavarró & Solà (2004). Second, we review the analyses proposed for subextraction in the literature and point out some of their empirical and/or conceptual shortcomings. Third, we provide an analysis of the adult grammar of Catalan which can encompass the facts of child Catalan in a natural way and is also consistent with the facts from other languages.*