In August 1970 a spectacular rock climb was televised live on BBC in color. Seven climbers attempted three different routes on the cliffs of Anglesey. The event, presented by Christopher Brasher was transmitted live through 4 connections over the course of 31st of august. The routes climbed were: Spider's Web, by Joe Brown and Ian McNaught-Davis; Wen Slab, by Peter Crew and Don Whillans; and Tyrannosaurus Rex, by Laurie and Les Holliwell, and Janet Rogers. This was the first color live climbing program on BBC, following on from the success of earlier programs such as the ascent of the Old Man of Hoy in 1967.
| Actor | Role |
|---|---|
 Chris BrasherSelf | Self |
 Joe BrownSelf | Self |
 Peter CrewSelf | Self |
| IIan McNaught-DavisSelf | Self |
| JJanet RogersSelf | Self |
 Don WhillansSelf | Self |
| LLes HolliwellSelf | Self |
| LLaurie HolliwellSelf | Self |