Complex sentence: Mansfield was spotted for the role when auditioning for future BBC series "Merlin", the casting director (who also works as the casting director for Primeval) suggested that he come along to audition for Captain Becker.
Split into simpler sentences: Mansfield was spotted for the role when auditioning for future BBC series "Merlin". The casting director, who also worked as the casting director for "Primeval", suggested that he come along to audition for Captain Becker.