Complex sentence: Daphnée Duplaix stated she was unaware that Valerie was Vincent's split personality; she said the cast would not know their future storylines "until (they) ha (d) the script in (their) hand (s)".
Split into simpler sentences: Daphnée Duplaix stated she was unaware that Valerie was really Vincent's split personality. Dupalix said the cast would not know their future storylines "until (they) ha (d) the script in (their) hand (s)".