The Gathering (Doctor Who)

On the morning of 22 September 2006, Tegan woke up. She was expecting to spend the day relaxing at home and, that evening, tolerate a party thrown to celebrate her 46th birthday. But things don't always go as expected, it's been over twenty years since she chose to leave the Doctor. She's got a job, mates... a life. Meanwhile her friend, Katherine Chambers, makes a decision that could change all their lives, and Tegan discovers that you can never really escape the past.