Sport is all about stories, rivalry and context. But watching the show's highlights without commentary would have had little idea about the importance of Brighton's win against Brentford. Even the most discerning fan would have struggled to identify the scorer of Brighton's second goal - a scruffy, goal-line effort that was initially awarded as an own goal. Watching these highlight clips without the excitement and insight of the commentator's voice left the mind wandering and action swiftly forgotten. It started with radio, where commentators provided an exciting new way that fans without tickets could experience the game live. By the 1930s, sports commentary had exploded.