Battlefield (Doctor Who)
Doctor Who serial

Battlefield is the first serial of the 26th season of the British science fiction television series Doctor Who, which was first broadcast in four weekly parts on BBC1 from 6 to 27 September 1989. It was the last to feature Nicholas Courtney as Brigadier Lethbridge-Stewart in the show.
In the serial, Morgaine (Jean Marsh), a sorceress from another dimension, summons the planet-devouring Destroyer (Marek Anton) in England, where she also seeks to take the sword Excalibur for herself. The plot is loosely based on Arthurian legend.
Plot
In response to a distress signal, the Seventh Doctor and Ace materialise the TARDIS near Lake Vortigern in England, where a UNIT convoy led by Brigadier Winifred Bambera is transporting a nuclear missile. At the Gore Crow hotel, they meet a young woman called Shou Yuing and a knight, Ancelyn, who addresses the Doctor as "Merlin". The Doctor shows interest in a scabbard which hangs over the mantelpiece in the hotel. The party is surrounded by an ominous group of knights led by Mordred who leaves after recognising The Doctor as "Merlin". When Mordred begins an arcane ritual, the scabbard flies across the room, stirred by the magic. A sorceress, Morgaine, then arrives on the scene through a rift in space and time.
Begin with the source’s own compact description: “Battlefield (Doctor Who)” is doctor Who serial. The dossier treats that line as a proposition to test through Battlefield, Doctor and serial, not as a finished interpretation.
Why this record matters
The phrase “doctor Who serial” supplies a clear boundary for inquiry. It also exposes the unanswered questions: who defined that boundary, when it became stable and which sources sit outside it.
Vocabulary and entity names are the principal evidence signals here, because they determine the precision of every later search. The source revision retrieved here is dated Sep 26, 2026. The linked authority identifier is Q4873098. 1 of 1 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 1989.
Overview language is designed for orientation and should not be treated as a substitute for the evidence cited beneath it. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
Use the entry as an orientation point, then follow its citations and revision history. Names, dates and institutional relationships should be checked against the original record.
- Subject orientation
- Search vocabulary
- Locating named sources
The closest primary source, responsible institution and strongest cited specialist reference.
Three-step research path
- Establish the record: confirm the title “Battlefield (Doctor Who)”, its source revision and the description used here.
- Expand the search: follow Battlefield (Doctor Who) primary sources, Battlefield (Doctor Who) archive and Battlefield research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
- Which source most directly establishes the central claim about “Battlefield (Doctor Who)”?
- Which cited source is closest to the event, object or claim?
- What terminology or title could unlock a more precise catalogue search?
Search terms from this dossier
This entry incorporates text from “Battlefield (Doctor Who)” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.