An exploration of loss set inside a video game, In Perpetuum was commissioned as part of the 2020 BBC New Creatives programme.

Calum worked as principal offline editor, cutting footage shot inside the Unreal game engine.

In Perpetuum was broadcast on BBC4 on 08/03/21, and was nominated for a 2022 RTS award in the Short Form category. The film played at London Short Film Festival in 2022.