Cow and Chicken

The episode "The Full Mounty" makes a large amount of references to the character Dad's name. For example the woman on the loudspeaker calls him Mr Dad and when asked what their Dad's name is Chicken responds by saying Dad. It also makes a nod to the fact that he is only a pair of leg's - when he tells Cow and Chicken he gets goose pimple's all over his legs when thinking about his work, Chicken responds "Where else would you get them?".

At the beginning of the episode "The Full Mounty" unusually Cow is sleeping standing up on two legs.

The episode "The Full Mounty" is the first time we get any idea of Dad's work or what he does. It turns out his job is guarding money for the government.

In the episode The Full Mounty the Red guy reveals that his father and grandfather were both meter maids.

When Dad returns from the salon he is still wearing women's shoes.

When Cow is on the run both of her bags are brown. However in the movie theater one is brown and one is white. After she leaves and is on the run again both bags are back to being brown.

After all the shoppers leave the elevator, one bag can be spotted in the corner of the floor.

Mom's bras are "designer aviator goggles".

Red Guy says he's Paraguayan.

The Red Guy's Roles on C&C: Raul C. Ropa, Royal Canada Mounty Officer Hiney
The Red Guy's Role on IMW: Louie B. Bare

Dad runs off to get a manicure for Mom, but he really gets a pedicure.

The Red Guy's Roles on C&C: Himself/Eye Screem Man
The Red Guy's Role on IMW: Emperor Gludius Maximus

Since when is there a subway tunnel in front of Cow and Chicken's house?

It is revealed in the episode "Cloud Nine" that Dad collects Jet Fighter Rides and keeps them in the basement.

The license plate on the Red Guys truck reads "Buns 4 u" in Cloud Nine.

The Red Guy's Role on C&C: Himself
The Red Guy's Role on IMW: King and Queen of England/Redcoats

In the I am Weasel segment "Revolutionary Weasel", there were seven Red Guys on screen at the same time.

In "Cloud Nine" when Chicken uses all of the extention cords when the truck stops he puts a quarter in the machine but where did he get that quarter from, he already put it in the machine earlier and Cow only gave him one quarter. It would be impossible to get it out of the machine.

In the episode cow's magic blanket it is revealed that supercow's cape doesn't give you super powers if it is worn upside down.

When Cow goes to throw her blanket out of the window her udders hit Chicken in the face.