Tamil cinema is about to witness a unique event with two films connected to a father and son releasing back-to-back. The 2005 hit ‘Thirupaachi’, starring Vijay and Trisha, is making a comeback to theatres after 21 years. Following this, Vijay’s son Jason Sanjay’s first film as a director, ‘Sigma’, is expected to release. According to reports, ‘Thirupaachi’ is slated for October 1, with ‘Sigma’ following on October 2.