Give some stream of consciousness and then the answer. Kenneth Charles "Ken" Osmond (born June 7, 1943) is an American actor and retired policeman. Beginning a prolific career as a child actor at the age of four, Osmond is best known for his iconic role as Eddie Haskell on the 1950s television situation comedy Leave It to Beaver, and for reprising it on the 1980s revival series The New Leave It to Beaver. Typecast by the role, he found it hard to get other acting work and became a Los Angeles policeman. After retiring from the police, he resumed his acting career.

Based on this passage, who played eddie in leave it to beaver?
The relevant information to answer the above question is: Beginning a prolific career as a child actor at the age of four, Osmond is best known for his iconic role as Eddie Haskell on the 1950s television situation comedy Leave It to Beaver, and for reprising it on the 1980s revival series The New Leave It to Beaver.
Therefore, the answer is Kenneth Charles '' Ken '' Osmond.