Two-Dimensional Crossover Incident
From Tardis Wiki, the free Doctor Who reference
The Two-Dimensional Crossover Incident (PROSE: TARDIS Type 40 Instruction Manual [+]Loading...["TARDIS Type 40 Instruction Manual (reference book)"]) was the Time Lords' designation for the event in which the Twelfth Doctor and Clara Oswald confronted the Boneless. (TV: Flatline [+]Loading...["Flatline (TV story)"])