During the first stage of renovations, Legendrama Productions Ltd. was hired to create a historical outdoor show, "Son et Lumiere" ("Sound and Light" in French) for $70,000. While similar shows were being used at such famous tourist attractions as Versailles (France), the Parthenon (Greece) and the Sphinx (Egypt), at the time this was the first show of its kind in Canada.
From June 24, 1965, visitors enjoyed more than 600 coloured lights and 54 speakers playing a 40-minute soundtrack at an amphitheatre built around the Cockpit Theatre just for the occasion. 13 actors, including the popular radio actors Mavor Moore, Ruth Springfield and Bob Christie, played 23 roles, such as Sir Allan MacNab, Lady MacNab and Sir John A. Macdonald in a recreation of Sophia MacNab's wedding day, November 15, 1865. 150 typical situations were presented in sound and light, such as a Victorian dance, and the noise of a carriage pulling into the driveway.
However, changes to the program were soon needed. Even though Sound and Light was considered a great success, after two weeks it was cut to 15 minutes to remove some confusing dialogue. Perhaps to make up for this, the usherettes for the show began wearing 19th century period costumes while they worked. This was the beginning of the tradition that continues today for Castle guides and demonstrators to wear period costumes.
By the end of the first year of the show, only 86 of the 109 planned Sound and Light shows had been played because of bad weather. Still, 12,015 people had managed to attend, 2,917 of them children. The show continued to run daily for three years until the end of 1968, when Castle administration decided that it was too expensive to run so often. From 1969, the show was played either once a week, or for large groups on order.