Answer:
Both sentences should use the word que
Explanation:
This is the case because neither of the sentences have verbs following the qui/que. Qui, when used as a relative pronoun (as in the cases of these sentences) is always followed by a verb. Que, when used as a relative pronoun, is not.
Bonjour !
Je pense "que" le film est mal !
Je pense qu'il y a une incohérence dans l'intrigue.