Multi-Doctor event

"Multi-Doctor Event" was a term used by the Twelfth Doctor to refer to incidents in which several incarnations of the Doctor interacted.

Clara Oswald, Alice Obiefune, and Gabby Gonzalez sought to prevent a Multi-Doctor Event by keeping the Tenth, Eleventh, and Twelfth Doctors from meeting each other when they were all near the same café in 1923 Paris. (COMIC: Four Doctors)