Complex sentence: To preserve the shock ending to this storyline the true identity of Robyn's portrayer was kept secret from all but a few central cast and crew members of the series, her scenes were shot on a closed set and Carlotta was credited as "Carolle Lea".
Split into simpler sentences: To preserve the shock ending to this storyline, the true identity of Robyn's portrayer was kept secret from all but a few central cast and crew members of the series. Her scenes were shot on a closed set and Carlotta was credited as "Carolle Lea".