cliff-hang
intransitive verb
ˈklif-ˌhaŋ 
: to end an installment of a cliffhanger with a suspenseful usually melodramatic unresolved conflict designed to entice the audience to read or view the succeeding installment to discover the resolution of the conflict
to forbid cliff-hanging in children's radio serials
Word History
First Known Use
1938, in the meaning defined above