Short answers, pulled from the story.
Wyatt's rebellion was caused by the fear that Queen Mary I's marriage to Philip II of Spain would turn England into a province of the Habsburg Empire and establish popish religion. The rebellion was driven by the landed gentry and parliamentary classes who feared foreign domination and the cost of subsidies for foreign wars.
The rebellion was led by Sir Thomas Wyatt, Sir James Croft, Sir Peter Carew, and Henry Grey, Duke of Suffolk. These four men formed the core of the conspiracy along with William Thomas and Edward Courtenay.
Wyatt's rebellion began on the 25th of January 1554 when he raised his standard at Maidstone. The rebellion ended with Wyatt's surrender on the 6th of February 1554 and his execution on the 11th of April 1554.
Elizabeth was imprisoned in the Tower of London on the 18th of March 1554 after being implicated in the rebellion. She was released from the Tower on the 19th of May 1554 despite the lack of conclusive evidence against her.
Out of some 3,000 captured insurgents, only about 150 were executed. The rest received prison sentences and were ultimately freed on the 20th of January 1555 at the request of Philip.