SELECT "Original Airdate" FROM table_22398 WHERE "U.S. Acres Episode" = 'Who Done It?'
What is the original air date of the u.s. acres episode who done it?
CREATE TABLE table_22398 (
    "Episode" text,
    "Garfield Episode 1" text,
    "U.S. Acres Episode" text,
    "Garfield Episode 2" text,
    "Original Airdate" text
)