Fabula
Object
Object

TARDIS Access Key (Marco Polo's Journal)

A standalone physical key distinct from its container (Marco Polo's journal). Its possession and transfer between characters (Susan, Tegana, Ping-Cho) drive critical plot points unrelated to the journal's narrative role.
22 appearances

Purpose

Unlock the TARDIS and enable the group's escape

Significance

The keys anchor the Doctor's escape strategy and symbolize control over the TARDIS, fracturing alliances as Marco withholds them and Tegana schemes to seize the ship, heightening isolation and urgency for the companions.

Appearances in the Narrative

When this object appears and how it's used

22 moments
S1E17 · The Wall of Lies
Susan reveals TARDIS key location to Tegana

The TARDIS key is the linchpin of this event, as its location is inadvertently revealed during Susan and Ping-Cho’s conversation. Susan’s line, 'I'd forgotten you knew anything about the key,' confirms that Ping-Cho is aware of where the key is hidden—a detail Tegana has been desperate to uncover. The key’s symbolic role as the means to access the TARDIS makes this revelation a turning point, as it empowers Tegana to accelerate his plan. The key is not physically present in the scene, but its absence is felt acutely, as its location becomes the object of Tegana’s predatory focus. The dialogue implies that the key is stored within the caravan’s guarded wagons, a detail Tegana will exploit in his next move.

Before: The TARDIS key is hidden within the caravan’s guarded wagons, its location known only to a select few, including Ping-Cho. It is a highly sought-after object, as possession of it grants access to the TARDIS and, by extension, the power to control the travelers’ fate. Tegana has been searching for this information, and the conversation between Susan and Ping-Cho provides the breakthrough he needs.
After: The TARDIS key’s status shifts from a hidden secret to a known vulnerability. Tegana now possesses the critical intelligence needed to locate and seize it, setting the stage for his next actions. The key’s symbolic role as the gateway to the TARDIS—and thus to the travelers’ freedom or captivity—is reinforced, as its discovery becomes the catalyst for the next phase of conflict.
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