Lucy tells her mother-in-law that she is making arroz con pollo (chicken and rice) for dinner but the dinner that she later burns in the oven is clearly some kind of a roast. Arroz con pollo is cooked in a pot on the stove top.
Desi when translating between his mother and Lucy was supposed to say "I got my wires crossed" but says "I got my fingers crossed".
Desi's line was supposed to be "We are thinking of putting him on to the bill." He ad libbed "We are thinking of using him at the club" forgetting that he is at the club when he is saying it.