Crossword puzzle clue "followed as a p i would"

What you'll see if you watch "Raging Bull" followed by "Taxi Driver" followed by "The King of Comedy"?

Followed, as a P.I. would

Defiant question sometimes followed by "Would you still..."

"Would you eat them in a box? / Would you eat them with a fox?"

"You know that it would be untrue, you know that I would be a ___"

"Would you eat them in a box? Would you eat them with a fox?" asker

Followed a doctor's order?

    Followed, as advice