Trunks and his parents, and Goku had travelled to the Future for some reason. When Bulma saw Yajirobe, she said:
Thank you. I heard you saved them.
I am wondering why it is neither
Thank you. I heard you save them.
Thank you. I heard you that saved them.
because our English teachers used to tell us that infinitive is used without to after certain verbs of perception, such as hear and see.
Or is it just a difference between American English and British English?