title: How to find by foreign id?
body: <p>I try to get a result by themovidb API with a thetvdb ID<br>
  I'm not sure what I'm doin wrong</p>
  
  <p><a href="http://docs.themoviedb.apiary.io/#find" rel="nofollow">Documentation</a></p>
  
  <p>My try to access the API  </p>
  
  <blockquote>
    <p><a href="http://api.themoviedb.org/3/find/71663?api_key=XXX" rel="nofollow">http://api.themoviedb.org/3/find/71663?api_key=XXX</a></p>
  </blockquote>
  
  <p>My result</p>
  
  <blockquote>
    <p>{"status_code":6,"status_message":"Invalid id - The pre-requisite id is invalid or not found"}</p>
  </blockquote>
  
  <p>ID <a href="http://thetvdb.com/?tab=series&amp;id=71663&amp;lid=14" rel="nofollow">71663</a> on thetvdb<br>
  I'm pretty sure I get this working before - but this time I can't figure out whats wrong. I think I'm missing something that defines that I'm looking for a TV show.</p>