Martha Takes the Cake and Codename: Martha is the 3rd episode of Martha Speaks. First aired on Knowledge at September 2, 2008, then aired on PBS at September 3, 2008.
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Nelson ate the cake


Martha Takes the Cake: After Martha if framed for eating Alice's birthday cake T.D. and Helen have to prove she's innocent.

Codename: Martha: Martha thinks that two undercover cops are crooks and she, Helen, and T.D. spy on them.