Henry: Come on, Junior.
Indiana: Will you please stop calling me Junior?
Sallah: Please, what does this mean? Always with this Junior?
Henry: That's his name: Henry Jones, Junior.
Indiana: I like Indiana.
Henry: We named the dog Indiana.
Sallah: The dog? You are named after the dog.
Marcus: Can we go home please?
Indiana: I have a lot of fond memories of that dog.
When Indy is stepping on the letters at the end, trying to spell out God's name, he steps on J, incorrectly, causing it to collapse. When he falls through, however, he grabs onto another letter so as not to fall down. The letters he grabs onto and pulls himself up are an L and a Y, which are not in the word Iehova, so should have collapsed too.
When Indy asks his father how he knew Elsa was a Nazi, Henry replies, "She talks in her sleep". Sean Connery ad-libbed this line.