Edgar Wallace

The telephone played an important role in The Edgar Wallace Mystery series. However, the standard British phone ring of the day comprised two steady rings with a cadence of 0.4 sec on, 0.2 sec off, 0.4 sec on, then 2 sec off. Presumably, to save time and inject a sense of urgency into the proceedings, British telephone rings in both this and many other presentations of the day were frequently speed-up, sometimes to twice the normal rate.

In US each episode was cut to 45 minutes to fit hour-long commercial TV slots.