Doctor training

In the penultimate episode of series 3, Doctor Tom puts Erica through a test to see if she has gained anything from the 2 years together. She passes the test and Doctor Tom tells her that she is now to start training to be a doctor. He leads her into a blank white room and tells her it will be her office and she must use her mind to create the interior. She creates a bookcase, a fancy chair and a table before asking Doctor Tom how she leaves the office. He replies just imagine where you want to go and a door will appear. He hands her a business card labelled "Doctor Erica" and tells her its time to meet her 1st patient. Before sending her onto a street. She looks around in awe as someone taps her on the shoulder(presumably her 1st patient) she turns around and smiing,