Here's the trailer for the four-part British miniseries A Young Doctor's Notebook starring Donald Draper as a grown up Harry Potter and Harry Potter as a young, much tinier Donald Draper. Donald Draper has a sort of alright English accent and, at one point, he and Harry Potter sit naked in a bathtub together. Does this do anything for you? Let me know if this does something for you.

[Vulture]