ABSTRACT Legislative oversight of the executive branch is a fundamental mechanism for ensuring government accountability, good governance, and enhancing democracy. However, formal oversight powers alone are insufficient, and the practical application eventually determines effectiveness. In contemporary times, a distinct set of political phenomena exists, notably the emergence of populism and polarisation, a deep-seated crisis of representation, and a systematic decline in public trust regarding diverse branches of government, coupled with the personalisation of politics and the weakening of political parties. In light of these developments, it is essential to engage in a meticulous examination of the means by which legislatures can enhance their capacity to effectively oversee governments. This article examines the parliamentary committee of inquiry led by Knesset Member Eitan Cabel in Israel from 2017 to 2019, which focused on credit arrangements for large business borrowers. This committee's rigorous investigation into financial system failures makes it an exemplary case of robust oversight in action. The article analyses the Committee establishment, composition, mandate, systematic meeting-planning and questioning process, unique physical setting, report publishing, and other details. The analysis of the Committee's work reveals important insights regarding effective oversight, and isolates the practices which made its work such an augmented performance of legislative oversight. Factors such as the committee's activeness, cooperation, independence, preparation, respectful yet critical approach, transparency, accurate use of media, and precise procedure, created an exceptional performance of legislative oversight. The article concludes that while legislative oversight relies partly on formal mechanisms, it is primarily driven by how political actors apply them, and reveals the importance and centrality of the human factor. This single case analysis, focusing on the committee's oversight practices can inform comparative learning on delivering robust oversight beyond Israel's context, and derive widely applicable insights into key practices for effective legislative supervision of the executive branch.