In one of Russell finest ever efforts we see him wring every ounce of potential out of a simple yet brilliant idea. Copycat teasing turned evil - something kids can copy in the playground. Donna takes a break in the spa whilst The Doctor is left to convince a group of increasingly disgruntled strangers not to kill him. Russell is brilliant at writing conflict, so it’s great to see him let loose and develop a bottle episode which focuses on people and negative social dynamics in high a pressure, claustrophobic environment.

Louise Sharp is magnificent in this as the possessed woman who turns the group against each other. I loved her alongside Alan Davies in RTD’s magnificent Bob & Rose. When she turns on the possession it is spine tingling! David Troughton is spookily like his father in tone and mannerisms in his well acted but small role - a special treat for fans.

A special shout out needs to go to Alice Troughton’s direction for managing to make what is in the most part a single set and a series of very long takes look so interesting over the course of a whole episode. She made magic out of a very small budget.

This story makes me wish RTD had more of a chance to focus on writing one off, disconnected stories rather than focusing on the beginning, ending and connective tissue of each series.