SELECT "release date" FROM table_21107 WHERE "Title" = 'Destiny of the Daleks'
What is the release date for Destiny of the Daleks?
CREATE TABLE table_21107 (
    "Story #" real,
    "Title" text,
    "Doctor" text,
    "Narrator" text,
    "Format" text,
    "release date" text,
    "Notes" text
)