Data-com probe
A retractable data-com probe, capable of analysing all known substances, was part of K9's (PROSE: The Visual Dictionary [+]Loading...["The Visual Dictionary (2007 reference book)"]) eye-screen. (PROSE: Doctor Who and the Invisible Enemy [+]Loading...["Doctor Who and the Invisible Enemy (novelisation)"]) The K9 Mark 2 model following K9 Mark I's regeneration did not sport a visible probe on his eye-screen. (TV: Regeneration [+]Loading...["Regeneration (TV story)"])
K9 Mark III identified Krillitane oil with his probe when the Tenth Doctor smeared a sample onto it. (TV: School Reunion [+]Loading...["School Reunion (TV story)"])
During the Planetary Relocation Incident, K9 Mark IV used his probe to transfer the basecode of the Doctor's TARDIS to Mr Smith, facilitating the Children of Time's return of the planet Earth from out of the Medusa Cascade. (TV: Journey's End [+]Loading...["Journey's End (TV story)"])
After being smuggled into Park Vale Comprehensive School by Clyde Langer, K9's probe detected alien plant DNA, later determined to be Rakweed, that had entered Clyde's classroom. K9 later used his probe to adjust the frequency of a school bell, boosting its volume to eliminate the Rakweed. (TV: The Gift [+]Loading...["The Gift (TV story)"])
In their rescue of Sarah Jane and Luke Smith, who had been captured by a Slitheen, K9, acting on Rani Chandra's instructions, used his probe to deactivate the timer mechanism of the Slitheen's bomb, successfully neutralising it. (TV: The Nightmare Man [+]Loading...["The Nightmare Man (TV story)"])
