1. Tom Bosley
   Robert Reed
2. Carroll O'Connor

Tom Bosley played Howard Cunningham, who is Richie's father and a surrogate father to many of Richie's friends.

1. Michael
   Arthur
2. Thomas

Henry Winkler played the ultracool Arthur Fonzarelli, a greaser with a heart of gold.

1. Jennie
   Joanie
2. Jeannie

Erin Moran played Joanie Cunningham for the duration of the series.

1. Robert
   Richie
2. Randall

Ron Howard starred as Richie Cunningham, a teen from Milwaukee, Wisconsin.

1. Arnold's
   Fonzie's
2. Andy's

Arnold's Diner became Al's Diner when Al Delvecchio took the helm during season four.

1. Potsie
   Pansy
2. Motsie

Williams played Warren "Potsie" Weber. He later went on to become a director, just like Ron Howard.

1. True
2. False

Most tried out for the part of Richie but ended up playing the wisecracking Ralph Malph.

1. Donna Reed
   Florence Henderson
2. Marion Ross

At age 46, Marion Ross was selected to play the role of Marion Cunningham, or Mrs. C.

1. Danny
   Chuck
2. Mike

Richie and Joanie have an older brother named Chuck who mysteriously disappears from the series during the second season.

1. Chachi
   Potsie
2. Fonzie

When the Cunninghams need to make some extra cash, they rent out the room above the garage to Fonzie.

1. Linda
   Lydia
2. Lori Beth

Richie and Lori Beth date throughout the series and eventually marry.

1. Shortcake
   Cheesecake
2. Sweet Cheeks

Fonzie is very close to the Cunningham family and frequently refers to Joanie as "Shortcake."

1. True
2. False

To promote the show, creator Garry Marshall had the gang form a softball team, which performed before MLB games.

1. Lovers Lane
   Necker's Nook
2. Inspiration Point

The "Happy Days" gang relies on Inspiration Point for some time away from prying eyes.

1. Lady
   Leather
2. Pinky

Fonz famously dates Pinky Tuscadero during a much-hyped, three-part season four opener.

1. Chichi
   Chochi
2. Chachi

Charles "Chachi" Arcola is Fonzie's much-less-cool younger cousin. Wah wah wah.

1. 1954
   1964
2. 1974

Despite its 1950s setting, "Happy Days" premiered in 1974.

1. Richie
   Potsie
2. Fonzie

Fonzie joins Joanie in a dance marathon after pushing his motorcycle for 12 miles (19 kilometers) because it broke down.

1. Alien
   Doctor
2. Race car driver

Williams played Mork the alien on the season five episode "My Favorite Orkan."

1. "Mork & Mindy"
   "Three's Company"
2. "Laverne & Shirley"

"Happy Days "produced several spinoffs, including "Mork & Mindy," "Laverne & Shirley" and "Joanie Loves Chachi."

1. His motorcycle
   Al's
2. A shark

Fonzie jumped over a shark while waterskiing, giving rise to the phrase "jumping the shark."

1. True
2. False

When the show premiered, Fonzie sported a chaste tan windbreaker. The leather jacket came later.

1. True
2. False

Henry Winkler only won the role of Fonzie after producers decided that Dolenz was too tall to play alongside the shorter Ron Howard.

1. Bill Haley
   Buddy Holly
2. Ritchie Valens

Bill Haley and the Comets recorded a special version of "Rock Around the Clock" to serve as the "Happy Days" theme song.

1. Fonzie
   Potsie
2. Ralph

Ralph and Richie both leave the show in 1980 to "join the Army" and pursue other careers.

1. Four
   Five
2. Seven

Chachi, played by Scott Baio, joined the series during season four.

1. Seven
   Nine
2. Eleven

The show lasted a whopping 11 seasons, with more than 250 episodes airing between 1974 and 1984.

1. True
2. False

Marshall wanted to call the show "Cool," but the name didn't test well with audiences. He eventually settled on "Happy Days."

1. True
2. False

The show's creators were going to go with the name Arthur Masciarelli until they realized that "the Fonz" sounded much cooler than "the Mash."

1. James Dean
   The Lone Ranger
2. John Wayne

Fonzie finally gets the chance to meet his idol, the Lone Ranger, during season nine.