Groovy! Resident Alien turned the clock back 55 years in Season 4, Episode 3, "Ties That Bind," with a trip to Maine, circa 1970. The show, of course, is no stranger to messing with the time-space ...

It's a bird! It's a plane! It's a — wait, it actually is a bird. A really gross bird from outer space. That's right, we're talking about Edi Patterson, who returned as Heather in tonight's episode of ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." So, without further ado, get your face-huggers and chest-bursters ready. Because we're about to rank ...