What's the Kennection? #8

What cartoon reporter discovered 'The Secret of the Unicorn and Red Rackham's Treasure'?

What's the name of Stanley Kowalski's wife, which he famously yells at the end of Scene Three of 'A Streetcar Named Desire'?

What detective solved murders in 33 Agatha Christie novels by using his "little grey cells"?

What soon-to-be-famous action star was cast as the title alien in Predator, but quit during pre-production?

Due to his reputation for indecision, John Kerry was "Google bombed" in 2004 by making his site the top search result for what?

What's the "Kennection"?