This comedy series, which aired on Creator/{{ABC}} from 2007 to 2009, stars Creator/ChristinaApplegate as Samantha Newly, a once-unpleasant woman who--after getting in a car accident and emerging from the resultant coma with IdentityAmnesia--starts her life anew with a bubbly personality.

Not related to [[Series/DoctorWho that other "Who" series]]. [[WMG/TimeLord Maybe.]]

!!This show provides examples of:
* [[AllGirlsWantBadBoys All Guys Want Bad Girls]]: Despite (or perhaps because of) her unpleasant personality before the accident, Samantha had a boyfriend on whom she cheated with at least two other men. Both considered leaving their wives for her.
* AmoralAttorney[=/=]BunnyEarsLawyer: Despite (or perhaps because of) her cruel streak and party-girl personality, Bad Sam was a successful lawyer; Samantha's friend Andrea is also [[InformedAbility supposed to be a successful lawyer]], but comes across as more of a BrainlessBeauty.
* AmnesiacDissonance: The plot revolves around it.
* AmnesiacLiar
* AnalogyBackfire: In one episode, Samantha crashes her father's car and pressures Dena into helping her to push it into a lake. When Dena asserts that Samantha was acting like Bad Sam, Samantha tries to counter that she only ''looked'' like Bad Sam but is different and starts comparing herself to the difference between a snake and its shed skin. Then it hits her that the shed skin (what she's comparing her current personality to) is an empty shell.
* TheAtoner: Sort of. Samantha is and tries to be a better person than previously, but insists she isn't responsible for the actions of Bad Sam.
* BadBoss: Pre-amnesia Samantha to her secretary Tracy.
* BreadEggsMilkSquick: Dena has a habit of talking like this.
* ButtMonkey: Samantha's friend Dena.
* ComedicSociopathy: A lot of Sam's cruel actions before amnesia are alluded to and come across as darkly humorous.
* ContinuityCreep: The show had a lot of plot threads for a sitcom.
* CreatorProvincialism: Surprisingly averted. Series co-creator Cecila Ahern is Irish and everything else she has written (novels and short stories) are set in Ireland or at least of a strong Irish connection...but without being aware beforehand you'd never guess the show creator's anything other than American.
* GenkiGirl: Samantha's personality after the car accident - because of her amnesia, she approaches the world filled with wonder.
* GettingCrapPastTheRadar: In one episode, Samantha is expecting to have sex for the first time since amnesia and is advised by Dena that her "carpet should match the drapes" which Dena ''thinks'' means that her bra and panties should match. When Samantha echoes the phrase to Todd, he tells her, [[Film/ThePrincessBride "I don't think that phrase means what you think it means."]]
* GenreSavvy: Generally, when Samantha tries to explain her different personality due to amnesia, her listeners are skeptical, believing that this kind of amnesia was made up by Hollywood. Sam herself is aware of this, and once she finds out that "Bad Sam" used the amnesia excuse before, her reaction was something like "And you believed it?"
* [[EvilCostumeSwitch Good Costume Switch]]: In flashbacks, it's noticeable that Bad Sam wore a lot of black leather and was scuzzy looking, while the current Samantha dresses in bright colors.
* HardDrinkingPartyGirl: Andrea and Bad Sam. Andrea is almost certainly an alcoholic and amusingly, amnesiac Sam thought she was one as well, finding out she attended AA meetings. A few episodes later, it's revealed that this was only because of a court order and thus she can drink safely without worrying about alcoholism.
* IdentityAmnesia: The premise of the show.
* InTheBlood: In one episode, Samantha's mother asserts that an evil streak runs in the family but gets diluted with every generation.
* JekyllAndHyde: Samantha refers to her previous personality as "Bad Sam".
* LampshadeHanging: Not until Episode 5 did someone say, "Amnesia doesn't exist! It's just a cheap and lazy storytelling device."
* LaserGuidedAmnesia: Of the typical "Knows everything to be a functional member of society, but nothing about ones own identity" variety.
* MagicalNegro: Samantha's doorman, Frank, plays with this. True, she comes to him for advice and looks upon him as something of a conscience, but he's a DeadpanSnarker. Unlike many such characters, he frequently references having a life outside helping Samantha and tends to rebuff her attempts to claim him as a friend.
* RemonstratingWithAGun: "The Stalker" is about Samantha's attempt to apologize to someone to whom she stalked in her "evil" former personality, but continually makes the situation worse. During the same episode, she tries to bond with her father by going hunting with him. Thus, she ends up explaining to the man she stalked and the crowd that she is not crazy, while pointing a rifle at him and them.
* RichBitch: Andrea, pre-amnesia Samantha and, to a lesser extent, Samantha's mother.
* RomanticFalseLead: Chloe, the current girlfriend of Samantha's ex-boyfriend, Todd.
* TranslationByVolume: The show plays with this. The main character has amnesia and when she meets up with her friend, the friend starts using this trope, speaking loudly and with unnatural clarity. Another friend quickly berates her, letting her know that Samantha has amnesia but isn't deaf. She is also obviously not a foreigner.
* UglyGuyHotWife: Samantha's mother and father.