season premiere
noun /ˌsiːzn ˈpremieə(r)/
/ˌsiːzn prɪˈmɪr/
(also season opener
(especially North American English) /ˌsiːzn ˈəʊpənə(r)/
/ˌsiːzn ˈəʊpənər/
)- the first show of a new season (= set of episodes) of a TV series
- The season premiere is scheduled for September 21.