
1) Eleventh Doctor episode
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https://www.crosswordclues.com/clue/night-terrors

• A sudden awkening associated with a sensation of terror, occurring in children, esp. those of unstable nervous constitution.
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http://thinkexist.com/dictionary/meaning/night_terrors/

severe sleep disturbances occurring in non-REM sleep that produce feelings of deep fear, panic and anxiety. Night terrors are not categorized as dreams.
Found on
http://www.dreammoods.com/reference/glossary.htm

severe sleep disturbances occurring in non-REM sleep that produce feelings of deep fear, panic and anxiety. Night terrors are not categorized as dreams.
Found on
http://www.dreammoods.com/reference/glossary.htm

A disorder allied to nightmare, occurring in children, in which the child awakes screaming with fright, the distress persisting for a time during a state of semiconsciousness. ... Synonym: pavor nocturnus, sleep terror. ... (05 Mar 2000) ...
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http://www.encyclo.co.uk/local/20973
Night terrors (Medicine) A sudden awkening associated with a sensation of terror, occurring in children, esp. those of unstable nervous constitution.
Found on
http://www.encyclo.co.uk/webster/N/21

Type: Term Pronunciation: nīt′ ter′ŏrz Definitions: 1. A childhood disorder in which a child awakes screaming with fright, the distress persisting for a time during a state of semiconsciousness. Synonyms: pavor nocturnus, sleep terror
Found on
http://www.medilexicon.com/medicaldictionary.php?t=60479

fearful period while sleeping
Found on
https://sciencetrek.org/sciencetrek/topics/sleep/glossary.cfm

a form of nightmare causing abrupt awakening in terror; occurs mostly in children
Found on
https://www.encyclo.co.uk/local/20875
No exact match found.