Page "Romana" Paragraph 5

Although Tamm had left the show on relatively good terms and was willing to film a regeneration sequence for the start of Season 17, she was not invited to do so.

She has stated that the often-repeated explanation that she left due to pregnancy is a myth that was started by producer John Nathan-Turner as she was not pregnant when she decided to leave the series.

However, her pregnancy has been stated as the reason she was not able to film a regeneration sequence.