Sex & Nudity
- Captain Jack, a character already revealed to be bisexual, flirts with various male and female characters (continuing the running gag throughout the series of Jack hitting on an attractive being only to have the Doctor say "quit it!")
Violence & Gore
- There are numerous acts of violence in the episode, many revolving around the degenrate cannibalistic humanoids that the human race is trying to escape from. No overt gore is seen.
- Professor Yana electrocutes his assistant, Chantho, with a sparking wire after she shoots him once she realizes he is no longer kindly Professor Yana, but the Master.
- One part of the episode revolves around a fauty nuclear generator. We see one man getting vaporized by the intense radiation, and once Jack enters, it's intimated that only his immortality is keeping him from being killed in the same manner.
- The Doctor's severed hand (cut off in The Christmas Invasion) is seen in some shots.
Alcohol, Drugs & Smoking
Frightening & Intense Scenes
- The reveals of the cannibalistic humanoids is fairly intense and could be frightening to young children. The character of the Master is somewhat psychotic in this episode, as opposed to his more megalomanical characterizations from the original series, and his manic outbursts are random and frightening. The episode ends on a cliffhanger that creates a large amount of tension (The TARDIS stolen by the Master as the cannibals have finally breached the rocket base, leaving The Doctor, Martha and Jack seemingly marooned to their deaths).