Alarm clock

An alarm clock was a device, usually a clock, which made a loud noise at a predetermined time in order to wake up a sleeping individual.

Among the people who used alarm clocks were Bruce and Miranda (TV: Doctor Who), Rose Tyler (TV: Rose), Gwen Cooper (TV: Something Borrowed) and Amy Pond (TV: The Eleventh Hour). Trix MacMillan had a Mickey Mouse alarm clock in the TARDIS which had belonged to Anji Kapoor. (PROSE: Halflife) The Third Doctor told Sarah Jane Smith that his rhondium sensor was an alarm clock. (TV: The Time Warrior) Father Time used a giant alarm clock to render the Second Doctor and Jamie McCrimmon unconscious. (COMIC: Father Time)

The Fourth Doctor called the systems which would have revived the Nerva Beacon's humans their alarm clock. (TV: The Ark in Space) The Eighth Doctor likened piloting the TARDIS to setting an alarm clock, but Grace Holloway said she wasn't any good at setting alarm clocks. (TV: Doctor Who) The Eleventh Doctor realized that the mummy was not the "grandfather" that Merry Gejelh was to be sacrificed to, but in fact, functioned as Grandfather's alarm clock. (TV: The Rings of Akhaten)

The Eighth Doctor had an alarm clock from Somnambulos IV which woke up the sleeper by scrambling their sensory centres. (COMIC: Endgame)