When Craig announces to Tremayne that he and Sharon are going to Heligoland, a close up of Tremayne's map clearly shows the location of Heligoland. In a later scene, again we see Northern Europe on Tremayne's map, and Heligoland has disappeared from it.
Reginald Marsh has bright blond hair but his mustache is dark.
Shortly after making there escape in the small plane, the Champions trio are seen relaxing and removing the camouflage grease paint that helped them break into jungle lab. As she removes the paint, with a cotton swab, Sharon (Alexandra Bastedo) is inexplicably wearing full facial makeup beneath.