An ambitious research program into the generation, suppression and overall dynamics of runaway electrons (RE) has been conducted on the Tokamak à Configuration Variable (TCV) [^1]. Scenarios for studying REs during the startup, flat-top and disruption phases have been developed, and hundreds of dedicated experiments have generated a wealth of data from a diverse set of diagnostics. In this contribution we examine discharge \#52717 of TCV in detail. This discharge is representative of a typical TCV plasma disruption experiment with REs, with no external drive during the post-disruption runaway plateau. To achieve a post-disruption runaway beam in TCV, a significant runaway electron current must be generated prior to the disruption that comprises between 50-80% of the total pre-disruption plasma current. Following the disruption, the ohmic current is quickly, and fully, overtaken by relativistic electrons, leading to a near-full conversion of the remaining re-disruption current. Using the fluid-kinetic disruption modelling code DREAM [^2] we investigate the development of both the pre- and post-disruption relativistic currents. With magnetic equilibrium and kinetic profile data from experimental measurements, the experimental current evolution shortly before and after the disruption can be reproduced with reasonable assumptions on the radial transport of fast electrons. The simulations give insight into the role of runaway electrons in TCV disruptions, together with the dynamics of the plasma current decay in the runaway plateau. [^1]: J. Decker *et al*, [Nucl. Fusion **62** 076038 (2022)](https://doi.org/10.1088/1741-4326/ac544e) [^2]: M. Hoppe *et al*, [Comp. Phys. Comm. **268** 108098 (2021)](https://doi.org/10.1016/j.cpc.2021.108098)