cliffhanger

English Thesaurus

1. an episode that ends in suspense (noun.communication)

hypernym	:	episode, installment, instalment,
definition	:	a part of a broadcast serial (noun.communication)

2. a contest whose outcome is uncertain up to the very end (noun.event)

hypernym	:	competition, contest,
definition	:	an occasion on which a winner is selected from among two or more contestants (noun.event)