There is a (new) ten-episode series, called Will, depicting the "lost years" of Shakespeare and taking many liberties. Most of the adult characters are real: Robert Southwell , Francis Walsingham, Richard Topcliffe. Evidently it is possible to watch the episodes online.
There is one I have not been able to identify, an older man whom Marlowe regards with considerable affection, played by Julian Sands, and named Barrett Emerson; if real, his name, to history, might be Lord Something; he seemed wealthy, but quite ill. I have requested some books on Marlowe's friends (Christopher Marlowe: poet & spy and Christopher Marlowe and Richard Baines: journeys through the Elizabethan underground).
Added: Marlowe always says "My King" in speaking to this man, rather than using the name. In turn, Emerson always calls Marlowe "Wasp," rather than the "Kit" we would have expected. I don't know of anything about Marlowe that calls "wasp" to mind.
The question is, does anyone know who Barrett Emerson might have been, or know for sure that he is fictional?