3rd Rock From The Sun S3

John Lithgow has had quite an extraordinarily varied career over the last forty years, on stage and screen. He had major roles in Brian DePalma's thrilling Blow Out, Twilight Zone: The Movie (playing the same role as fellow 3rd Rock actor William Shatner), Terms of Endearment, Footloose, Harry and the Hendersons, Memphis Belle, Raising Cain, Cliffhanger, and many more.

The leggy, busty, brassy blonde bombshell of the group, Sally Solomon is actually only female because her original (asexual) alien form lost a bet! Nevertheless, while the female of the human species is understandably even tougher to work out than the male, she soon starts to revel in it.

In a show about aliens in human form, struggling to get used to our bizarre Earth ways, Harry Solomon is unquestionably the one that struggles more than any other. Perpetually squinty-eyed and perplexed, and utilising French Stewart's prodigious skills with physical comedy to the utmost, Harry somehow manages to blunder his way into the hearts of a string of women. Artistic or autistic? It's a fine line...

Being a kid pretending to be an alien pretending to be a kid can't be the easiest gig in the world, but Gordon-Levitt carries it off with aplomb. Tommy Solomon is, in fact, the oldest alien of the group, but nevertheless stuck in the youngest body. The sagacity of his years, mixed with the unstable alchemy of teen hormones, makes for an intriguing and hilarious combination!

The long-suffering colleague of Dick Solomon, Mary of course ends up rather infatuated with the great big loon. So much more than just a 'straight man' to the wacky alien antics, she is one of Dick's prime sources of information about humanity, whether she realises it or not. A lifelong student of the human condition, it's no wonder Dick confuses and intrigues her!

When he is ordered to marry the Big Giant Head's niece Janet (Roseanne Barr), Dick rebels - sticking with his love for Mary.

Janet's arrival on earth not only brings complications for Dick, but Officer Don's eyes are opened to the fact that aliens could be among us.

Dick and Mary's bitterly broken engagement leads to an elaborate duel of practical-joke-one-upmanship.

Dick uncovers a very well buried family secret while visiting MaryÂ's parents. Meanwhile, Sally moves in with Nina.

It's Halloween, and Dick is petrified of a physical exam. Meanwhile, Harry is home alone with only strange noises from the basement for company.

When Dick discovers heÂ's put on weight he finds dieting impossible. Meanwhile, Don is jealous of SallyÂ's new friend Jeremy, a tomato plant.

Dick is eager to flex his judgemental muscles when he's called for jury duty, while Sally falls for an artist's charms.

With Dick friendless following his breakup with Mary, he's desperate for a new buddy - and Officer Don reluctantly fits the bill.

The Solomons look back on their past misdemeanours from their short history on Earth.

Tommy, the oldest of the aliens trapped in a teenage human body, decides he wants to meet women closer to his real age.

Dick tries to do a good deed and rehabilitate a criminal but, inevitably, he just makes things worse.

Fooling around in a wheelchair accidentally lands Dick in one for real and he soon vents his frustration.

Dick decides that it's time for him to date again and seeks advice from his resident 'experts' Sally and Officer Don.

A legion of Venusians disguised as stunningly beautiful women (including Cindy Crawford) arrive in Rutherford intent on taking over the Earth.

Tommy and Officer Don are all overjoyed at the attentions of so many gorgeous babes - but Sally smells a (Venusian) rat.

Harry's pet from home visits Earth Â- in human form! Meanwhile, Sally decides to pretend she's pregnant.

Dick's brash behaviour following a one-night stand gets Dr. Albright's knickers in a twist. Meanwhile the rest of the family go car shopping.

Dick's luck is in when, while on a quest to win back Mary's affections, the two of them are locked in the school library overnight.

Tommy decides to act his (real) age and checks himself into a retirement home while Officer Don tries to save face.

It's all change for the Solomons as Harry and Sally get jobs and Dick embarks on a new career path as a police officer.

When Mary gets fed up with the Solomons' craziness, Dick strives for normality - only to achieve boredom and turn her off completely.

Guest star John Cleese gives a riotous performance as a rival professor who's even crazier and more intelligent than Dick.

Sally, worried about her first kiss, turns to romance novels for inspiration.

Dick takes the family on a camping trip to bring them closer together, but MaryÂ's inclusion drives a wedge between them all.

Having driven Nina to a dentist appointment, HarryÂ's whimsical gesture is taken the wrong way and lands him in hot water.

While Tommy throws a dinner party, Harry is kidnapped by a love rival; which could have grave consequences for the whole family.