Tegan's Portable Temporal Tracker

Tegan’s tracking scanner displays evidence of the temporal displacement, showing a woodland walk instead of Heathrow Airport 1981. Though functional, the Doctor dismisses its reading as a mere ‘small error,’ making the device a silent witness to his denial and her growing disillusionment.

The scanner lies idle in the Doctor’s hand as Tegan and Nyssa share their moment in the corridor. It serves as a tangible symbol of the TARDIS’s malfunction, though its readings are dismissed in favor of personal confrontation. Its presence underscores the collision between technical failure and emotional fracture.

The handheld scanner confirms the error first detected by its screen displaying woodland instead of Heathrow, revealing the temporal displacement before any verbal acknowledgment. The Doctor manipulates it casually while dismissing concerns, emphasizing its role in exposing hidden reality.

The Master’s surveillance scanner projects Adric’s real-time movements as luminous blue runes across its screen, translating each step into data the villain savors. It operates not merely as a tracker but as an instrument of psychological domination, turning Adric’s physical absence into a tableau of captivity. The device’s hum underscores the predatory precision with which the Master seizes control.

The handheld scanner displays an unmistakable image of a woodland path instead of Heathrow’s terminal, silently exposing the navigational failure before any verbal revelation, intensifying the mounting disbelief and tension.

Tegan’s tracking scanner acts as the sole interface between hidden cosmic threat and immediate response, its green vectors illuminating the Urbankan pursuit ship in real time. The device’s double beep announces danger, its flash of jagged outline translating silent pursuit into actionable alarm. Tegan’s decisive twist locks the target into the TARDIS systems, converting analog ripple into a digital alarm that severs any illusion of safety.

The scanner lies under Tegan’s agitated grip, its green pulses flickering in time with shifting Urbankan pursuers outside the TARDIS. She sweeps it toward unseen feeds, locking onto the Doctor’s coordinates and broadcasting shifting images that confirm his exhaustion, its vectors framing the stage for Monarch’s taunt.

Though not explicitly wielded in this segment, the Master's Surveillance Scanner is referenced through Mobiliary's (Control's) scanning function. The scanning technology's cobalt high flux density readings become the catalyst for Monarch's emotional breakdown, demonstrating the Doctor's ability to evade detection and exposing the limitations of even advanced surveillance against temporal manipulation.