Complex sentence: The film features Rajinikanth in dual roles as a scientist and an android robot, and Aishwarya Rai Bachchan as the scientist's girlfriend.
Split into simpler sentences: The film features Rajinikanth and Aishwarya Rai Bachchan in the lead roles. Rajinikanth appears in dual roles as a scientist and an android robot while Bachchan appears as the scinetist's girlfriend.