Step By Step characters with summaries

	Frank Lambert	Quotes:
	Frank Lambert, a divorced contractor who had custody of his three children: JT, Al and Brendan. He marries Carol.
	Carol Foster Lambert	Quotes:
	Carol is a widowed mother who's a beautician. She's mother to Dana, Karen and Mark.
	John Thomas 'J.T.' Lambert	Quotes:
	JT is Frank's eldest son. He's into sports and has typical problems with his academic life.
	Dana Foster	Quotes:
	Dana is one of Carol's daughters. She is smart, outspoken, independent, and often sarcastic. She and JT often exchange verbal blows, and she surprisingly ends up dating his friend Rich.
	Alicia 'Al' Lambert	Quotes:
	Al is Frank's daughter. At the beginning she was tough, tomboyish, and often made jokes towards Dana and Karen. She eventually becomes sisterly with them and later in the series she discovers a love and talent for acting.
	Karen Foster	Quotes:
	Karen is one of Carol's daughters. She's known for being extremely vain and a bit air-headed. She becomes an aspiring country singer.
	Mark Foster	Quotes:
	Mark is Carol's son. He's a typical nerd, and his new relationships with the tough Lambert siblings helps give him more confidence and toughen him up.
	Brendan Lambert	Quotes:
	Brendan is Frank's youngest son. Brendan wasn't given much as far as story lines was involved, and during the fifth season, he was eventually reduced to minor appearances, before being dropped from the last season.
	Cody Lambert	Quotes:
	Cody is Frank's nephew. He often acts spaced out, but has a good heart and has the best intentions. He lived in his van (Lucille) parked outside the house. Cody was absent from the show for a while, then it was revealed he was in Russia for a job he had gotten.
	Lilly Lambert	Quotes:
	Lilly is Frank & Carol's daughter. She was originally a baby, but was then aged to 4 years old for season 6.

Other Notable Charaters

	Rich Halke
	Rich is JT's best friend. They often get into trouble together. He ends up dating Dana after she starts tutoring him and falls for him.
	Jean-Luc Rieupeyroux
	Jean-Luc is Carol's friend and is a famous hairdresser. They become business partners and own a salon together. He's French, and speaks with a strong accent. The character was written into the show to take the comedic place of Cody, who was currently absent from the show. Like Cody, Jean-Luc becomes close with the family.
	Samantha Milano
	Sam becomes JT's girlfriend. He first meets her when she's working as a tow truck driver and finds out they have a lot in common.

-Some information taken from Wikipedia.org