Complex sentence: Unfortunately he would have his voice redubbed for the film's release, after which, it was back to playing a policeman in his next horror film with Price, The Abominable Dr. Phibes.
Split into simpler sentences: Unfortunately he would have his voice redubbed for the film's release. After which, it was back to playing a policeman in his next horror film with Price, The Abominable Dr. Phibes.