Cat Valentine and Sam Puckett are the two main characters of Sam & Cat, and they are best friends and roommates. The pairing of the characters is often referred to as Sat (S/am and C/at) or Puckentine (Puck/ett and Val/entine).
While eating a burrito she purchased from a food truck, Sam watches Cat saving a cat from a trash can and then (standing in the trash can) getting lifted into a garbage truck. Sam sacrifices her burrito to save Cat.
Sam jumps into the garbage truck and saves Cat, and she repays her by letting Sam shower at her Nona's apartment.
Nona moves to Elderly Acres, leaving Sam and Cat to babysit three children. Sam and Cat realize that they've had a fun time together and have potential for more adventures, so they decide to become roommates.
Sam agrees that she will be Cat's roommate, even though she could have easily said no and gone somewhere else.
In #FavoriteShow, Cat is upset when they cancel her favorite show That's a Drag!, so Sam goes with her to the set of the show to try and stop them from cancelling it.
Sam dries Cat's tears and makes her laugh.
Sam risks getting in huge trouble by stealing the set of That's a Drag for Cat.
Sam feels sympathy for Cat after watching an episode of That's a Drag where Cat says she wishes she always had a piece of the show. Sam goes with Dice to take some items off of the set but ends up changing the delivery and getting the whole set in Nona's apartment.
Cat hugs Sam because she's scared they are going to get kicked out of the building.
Sam and Cat work together to come up with plans to trick Dilben, which include getting Nona to pretend she's moving back in. When that proves impossible due to her sprained ankle they get Goomer to do it.
They come up with a huge plan just so that they wouldn't have to stop being roommates.
Sam and Cat compete to see who is the better babysitter when one of the kids they were babysitting says Sam or Cat was the best babysitter ever.
Sam and Cat made a bet that the best babysitter got the big bed.
After trying to convince the kids that they're the best babysitter they make the three kids they are babysitting choose which one of them is the best. The youngest kid, who never talked until then, asked Sam and Cat why it matters who the better babysitter is and told them that they are both great babysitters.
Cat promised to make Sam a million meat balls if she helped find the other pink shoe.
Sam loves the meatballs Cat made.
They seem to like each other and get along rather well, despite their strikingly different personalities.
Sam and Cat's friendship in Sam & Cat is similar to the relationship of Cat and Jade on Victorious, as Sam is sassy and abrasive like Jade and Cat is bubbly and eccentric. However, Sam's bad girl personality is less palpable than Jade's.
In an interview with the Huffington Post, Jennette McCurdy says "The relationship between Sam and Cat is very 'Odd Couple', and it proves that opposites attract. Cat's infectious behavior rubs off onto Sam, and they both end up getting along better than you think."
As a piece of their favorite show, That's a Drag! Sam gets all the furniture from the show moved into their apartment for Cat because Cat was upset.
They sleep in the same bedroom.
Technically, Sam and Cat already met each other in the iCarly episode iParty With Victorious. However, Dan said they never really interacted in his fun facts. However, Cat is aware of Sam's reputation from iCarly, which was pointed out in the Pilot episode after Sam saved her from the garbage truck.