Doctor Who Season 3 Episode 0 Smith and Jones

Doctor Who Smith and Jones 0/13

Martha Jones is a particularly astute medical student. On her way into work at a London hospital, she bumps into a strange man (the Doctor) who pauses in front of her and removes his tie, saying, "Like so, see?". When she arrives at work, she again meets the Doctor, who is lying in bed as a patient under the name 'John Smith'. He is unaware of seeing Martha earlier in the morning.

A brutal mercenary police force, the rhinoceros-like Judoon, who have no jurisdiction on Earth, transport the hospital to the Moon using a "H2O Scoop" in order to apprehend and execute Florence Finnegan, a shapeshifting, bloodsucking Plasmavore with the ability to appear as whatever species whose blood she consumes. Finnegan attempts to evade capture by sucking the blood of humans. Her first victim is Mr Stoker, the head doctor, and consequently she registers as a human when scanned by the Judoon. The Doctor performs a "genetic transfer" - kissing Martha to obtain human DNA, (as pictured) - in order to register as human when the Judoon scan him.

Tricked into thinking the Doctor is human, Finnegan sucks his blood causing him to collapse unconscious. Finnegan is apprehended by the Judoon after Martha persuades them to rescan her and she registers as non-human this time having the Doctor's blood in her system. The Judoon then execute Finnegan for the murder of the child princess of Padrivole Regency Nine.

Before expiring, Finnegan modified an MRI scanner to make it destroy all intelligent life on the Moon and on the half of Earth facing the Moon. Martha uses CPR on the Doctor's two hearts and manages to revive him, and he turns off the scanner. Oxygen levels are low and the occupants of the hospital are near death, but as they depart the Judoon return the hospital safely to Earth. Martha attends her brother's birthday party, but it breaks down into a family row. She notices the Doctor outside and follows him. He goes to the TARDIS and invites Martha to go on a trip with him as a reward for her help.

Martha hesitates until the Doctor says he can travel in time as well, and proves it by travelling back to the previous morning and taking off his tie in front of Martha (later explaining, "Crossing into established events is strictly forbidden--except for cheap tricks"). After this demonstration, Martha steps into the TARDIS (noting that it's bigger on the inside). The Doctor refers to Rose Tyler and emphasizes that Martha is not replacing her but is only going to get one trip as he prefers to travel alone.