As Windsor , Mister Sinister supposedly helped some mutants escape from Neverland , but he was only taking them to his own secret labs .
Unbeknownst to all except Sabretooth , Mister Sinister was disguised as the head scientist at the Neverland facility , Doctor Robert Windsor .
As Windsor , Mister Sinister supposedly helped some mutants escape from Neverland , but Mister Sinister was only taking Neverland to Mister Sinister 's own secret labs .
Unbeknownst to all except Sabretooth , Mister Sinister was disguised as the head scientist at the Neverland facility , Doctor Robert Windsor .