Of course, this also makes for a spectacular "Who's on first?"" sketch.Read more...
So at first, we thought this knock-knock joke was pretty cheesy, but we must admit that watching David Tennant and Bernard Cribbins (Wilfred Mott, Donna's grandfather) tell it on Never Mind the Buzzcocks was pretty amusing.
The Doctor tells a knock knock joke from inside the TARDIS on a heather blue, 50/50 cotton Polyester blend shirt. Machine wash cold. Do not bleach. Tumble dry low or lay flat to dry. Imported.
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