The Caretaker (Doctor Who)

Clara struggles to balance between the excitement of being the Twelfth Doctor's companion, the normality of teaching at Coal Hill School and keeping her relationship with Danny, a former soldier.

Privately, the Doctor explains that a murderous robot, the Skovox Blitzer, is near the school, and has already killed a community support officer.

He has been planting devices around the school to create a time displacement vortex in order to send the robot far into the future where it cannot harm anyone, and has an invisibility watch to help approach it.

The Doctor and Clara inadvertently trigger the Blitzer's self-destruct mechanism, but Danny's timely intervention allows them to force it to stand down.

[2] Principal photography was concluded on 11 April 2014; the final scene with Seb (portrayed by Chris Addison) was shot on 11 June 2014.

Richard Beech of Daily Mirror gave the episode 4 stars out of 5, calling it "funny, lighthearted, and thoroughly entertaining," and praised Capaldi's comic timing.

"[16] Morgan Jeffery of Digital Spy gave the episode a positive review, calling it "Funny, warm and moving."

[13] Matt Risley of IGN gave the episode a positive review, praising the characterisation of Clara in the current series.

He praised the acting of the three leads, but he too criticised the Blitzer, calling it "a design evoking the lovechild of a pew-pewing Jetsons maid knock-off and a Roomba gone haywire."

"[10] Neela Debnath of The Independent gave the episode a negative review, calling it "A bland Earth-based adventure that failed to excite."