Who played the role of Arnold on the ABC sitcom "Happy Days"?

More Questions:

What was the original name of "Skype"?

At which sport was Hungarian Victor Barna World Champion 5 times?

Who wrote "Memoirs of a Geisha"?

Who became an animated Disney megastar after replacing Oswald the Lucky Rabbit?

What literary work inspired Neutral Milk Hotel's "Holland 1945" song?

In what city would you find Tiergarten?

What is the second largest continent?

A cygnet is the name for a newly hatched or baby what?

The "Oort Cloud" is made up of what?

On what book series is the HBO TV series "True Blood" based?

In the TV show "The Simpsons', what does Krusty's dad do for a living?

What is Jason Voorhees" signature weapon?

What is the name of the town where the Sons of Anarchy have their motorcycle club?

What Celine Dion song was featured on the soundtrack to the movie "Titanic"?

In which European country is Tokaj wine produced?