Searching by performer can help you find a programme when its title is uncertain. It can also return interviews, trailers, related works and roles that were not the item you meant. Use the name as a clue, then verify the programme behind the result.
A recognisable face is a good starting point. It should not replace reading the actual title information.

Start with the strongest known clue
Use the performer’s genuine name as supplied by a reliable source or recommendation. If there are several people with similar names, retain another detail you know. Avoid guessing a credit to make the search look precise.
Netflix’s search guidance gives names as one type of search term within its product. That is a useful example, not proof that every platform indexes every credit or returns the same candidate set. Use the actual app’s supported search behaviour.
Read the media item
Check whether the result is the full programme, a preview, an interview or another related item. A person appearing in the result does not establish that the work is the one you intended. Read the synopsis and relevant credits before starting a transaction or session.
For a hypothetical search, the performer may have appeared in two similarly themed films. A plot clue and edition information can distinguish them. Do not silently substitute the first plausible result because it is available while the intended work remains unidentified.
Verify a useful combination of details
Compare the title, credited people and story context. If an original or alternate title is known, retain it beside the familiar name. A small set of consistent details is more reliable than one search string that happens to produce attractive artwork.
If you remain unsure, save the candidates as unresolved and ask the person who recommended the programme or consult a genuine title source. Beginning playback is not always the best identification tool, especially where it starts a limited transaction window.
Repair the record once identified
Update the watchlist with the actual title and the performer clue that helped. Keep the item’s identity separate from a temporary search-result position. Another household viewer should be able to locate the intended work without reproducing your exact browsing path.
Then check the practical viewing requirements: authorised route, edition and essential language or access features. A successful identity search does not establish those separate facts. Keeping the steps distinct prevents finding the right face from becoming an accidental promise about the whole programme arrangement.
Useful answers
Does a performer match prove the result is the intended film?
No. Confirm the actual work using title information, credits and relevant story context.
Why identify a trailer separately?
A preview can feature the right performer without being the full programme or establishing access to it.