Heart to Heart (The Largest Theatre in the World)

It was written by Terence Rattigan, directed by Alvin Rakoff and starred Kenneth More.

This involved a number of countries producing their own version of a television play which would be shown simultaneously.

[4] According to Peter Sallis, who was in the cast "The play went out and I don't think it was ever repeated.

Whether the citizens of each country appreciated the fact that it was being shown in a different language next door at the same time I don't know.

The effect it had on the history of television I would think was probably very slight, but it didn't do Terence Rattigan any harm.