Michael Richards plays Cosmo Kramer, Jerry’s neighbor in the apartment building. Kramer is almost never referred to as Cosmo, but almost always goes as Kramer. Kramer has no steady job throughout any of the seasons, and he seems to live on Jerry’s own food. Owning Jerry’s extra set of keys, he often barges in mid-way through conversations going on in at Jerry’s apartment. He seems to be mentally unstable, falling victim to a seizure caused by hearing Mary Hart’s voice. Kramer has a few other nicknames, such as Dr. Martin Van Nostrand and H.E. Pennypacker. No matter what happens between Kramer and the rest of the group, everyone remains friends.