» shannendoherty

May sweeps has officially arrived. For TV fans that means a full month of explosive season finales, jaw-dropping cliffhangers and -- best of all -- a long list of famous guest stars from both the big and small screens.

Among the A-listers you'll see this season: a daytime TV queen (Elisabeth Hasselbeck), a 'Star Trek' icon (Leonard Nimoy) and a two-time Oscar winner (Jodie Foster) who will finally let Maggie Simpson do the talking.

Check out our guest stars gallery to see when all of Hollywood's finest will be sweeping their way onto your favorite TV shows.

'Three's Company's' on-set feud ... Isaiah Washington's gay slur ... Miley Cyrus' racy pics ... find out where they rank on our list.

Before YouTube, camera phones and celebreality-TV, the best Hollywood catfights, feuds and fracases happened behind the scenes.

Some of the most salacious scandals were never caught on camera, but their fallout is the stuff of legend.

We dig deep -- from before the advent of the Internet and since -- to name our picks for TV's top 20 off-screen scandals of all time.

Whatever happened to Brenda, Brandon and the rest of the gang?

Gotta hand it to the late Aaron Spelling -- the guy knew what people liked.

And for 10 years, 1990-2000, we liked the Uber-producer's take on teen prime-time drama, 'Beverly Hills 90210.'

You won't find any of the kids at the Peach Pit anymore, but we did dig up an Oscar winner, two 'Dancing With the Stars' alums and .... well, look for yourself.