I see the api doesn't specify you can use the embed for this call but it would less the API calls required if added.
So, if one calls the http://api.tvmaze.com/lookup/shows?thetvdb=73141?embe... I'm more or less redirected to http://api.tvmaze.com/shows/215 without the info, so then I have to make another api call to shows with the embedded options to get all the results.
You could set your HTTP client not to automatically follow redirects, then manually parse the "Location" header from the response and add the embed parameters.
For example for curl: "CURLOPT_FOLLOWLOCATION TRUE to follow any "Location: " header that the server sends as part of the HTTP header (note this is recursive, PHP will follow as many "Location: " headers that it is sent, unless CURLOPT_MAXREDIRS is set)."
