Complete this dialogue between Nicky and the series' script girl

Gap-fill exercise

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!
-You're saying that this thermos contains a sort of...
-...very laxative, Nicky invents. It's an experiment. If the Doctor... the actor even just this amount...(she shows a little space between two fingers), he won't be able to play for days, weeks, . Unless you film him in the loo.