During the fight scene in the box trap between Nick and Steve, Zalman King (who played Nick) accidentally broke one of Gary Conway's (Steve) ribs. After Gary's recovery, the scene had to be filmed again. Zalman broke another of Gary's ribs (on the right side this time).
This is episode number 2406. It was the 6th episode in production order, but was the 13th to be broadcast. Because of this, like all early episodes, no giant is seen speaking.