Second, the web site http://www.omdbapi.com/ offers an api to get information about movies. For example using t allows one to specify the title of a movie. Define a query to get the poster of 'The Terminator'.
Have a look at ZnEasy or ZnClient.
To get the contents of an HTML request, send it the message contents.
To parse and convert a string representing JSON into Pharo collection, use the STON class (check the class side).
To pass a binding to a request, use the message queryAt:put:.
Using the inspector is a good idea to explore objects and query results.