It was reported this week that cast members from Modern Family are suing 20th Century Fox for what they claim are illegal contracts that bind them to the show until 2016.

The stars of the hit sit-com, Sofia Vergara, Eric Stonestreet, Julie Bowen, Jesse Tyler Ferguson and Ty Burrell, are asking that their contracts be terminated.

According to the Hollywood Reporter, they want their contracts nullified so they can ask for salary increases. They are being offered $150,000 an episode -- with the chance to earn $350,000 per episode before their contracts are up.

On Wednesday, the cast refused to attend a table read for the show's fourth season opener. Their decision to delay the start of the new season signals that the dispute is just beginning.

The conflict calls to mind some major contract issues in TV history. Here are five notable TV salary disagreements.

Friends
"Friends" Wiki Commons
Charlie Sheen
Charlie Sheen will play the United States' president in "Machete 2." IBTimes Pictures
Every Body Loves Raymond
"Every Body Loves Raymond" CBS
The Big Bang Theory
CBS' "The Big Bang Theory" commands more than $325,000 for a 30-second ad spot. CBS
Hollywood Hollywood TV