One of the eco-villains, Doctor Blight is a scientist, often found experimenting in various ways regarding how to take over the planet. She favours technology and chemicals in order to carry out her evil deeds.
Blight likes to show off her figure in skin-tight jumpsuits, usually coloured pink. She wears dark gloves and dark high-cut boots, as well as a utility belt slung loosely around her hips. Sometimes she wears a pink business suit. She will also occasionally wear a white lab coat.
Blight has blonde hair, which is styled to hide the horrific scar on the left side of her face. The origin of the scar is never revealed in the show. Dr. Blight seems to have mixed feelings toward the scar. In some episodes, such as The Energy Vampire and Losing Game, she has no problem showing the scar, and seems almost proud of it. However in other episodes, such as You Bet Your Planet and Frog Day Afternoon, she seems to be upset and embarassed by it, even trying various experiments to get rid of it.
These sort of contrasting feelings seem to be common in other areas of Dr. Blight's life as well, including her relationship with MAL. At times she will be very fun and flirtatious acting toward MAL, while at other times she will become angry and violent when dealing with him. She also seems to display the same extreme range of emotions when dealing with the other eco-villains or with Captain Planet and the Planeteers.
Blight descended from Betty Blight, who appears in the episode Hog Tide. Blight also has a sister, Bambi Blight, a Hollywood filmstar. She stars in the episode Hollywaste. It's evident that there is great tension between the sisters. Bambi Blight was the first person to reveal Dr. Blight's first name when she referred to her as "Babs", a shortened form of the name "Barbara."
Blight will often flirt or flatter in order to get her way, though she's not afraid to stand up for herself if one of the other eco-villains dares to upset her. She often supplies chemicals or machinery and technology to the other eco-villains in exchange for cash or favours.
Blight is originally voiced by Meg Ryan. In later episodes, she is voiced by Mary Kay Bergman.
Nukem: Dr. Blight, that computer of yours is a menace!
MAL: Why must we put up with this nuclear nitwit?
Blight: MAL, baby, you be polite! Dr. Nukem's here to help us be wicked.
MAL: It's sheer genius to get nuclear waste by pretending you already have it! No one cheats, lies and tricks better than you do, Doctor. Blight: Oh, MAL, you say the sweetest things...
Blight: Don't congratulate yourself yet, Planeteers. You're not safe, you've just prolonged your inevitable doom!
Captain Planet: What's going on? Where am I?
Blight: Welcome to my parlour, said the spider to the fly.
Blight punches MAL after Linka escapes.
Blight: You chip-head! She got away!
MAL: Doctor Blight, aren't you going to stick around and watch Hope Island go under?
Blight: No need, my micro-chipper friend. It's already on the rocks! Just think of the disasters when I melt the polar ice caps. Today, Hope Island - tomorrow, the world!
Blight is watching a tidal wave coming towards her speedboat.
Blight: Quick MAL! Tell me everything I need to know about surfing!
MAL: Just two words, Doctor. Wipe out!
Blight: I took the liberty of refuelling your rocket. The milage isn't great, but the pick-up's out of this world!
MAL: Doctor, your plant is leaking carbon dioxide into the air vents! It will put everyone in there to sleep.
Blight: What a gas, MAL! Did you ever have one of those days where everything was working out perfectly?
MAL: Your experiment is going quite well, Doctor!
Blight: You can bet your sweet hard-drive it is! My smoke-oil formula from melaleuca trees will make mace-in-the-face seem like breath freshener!
Blight: Ah, there's nothing like nature run amok.
MAL: Correction, Doctor. Melaleuca trees are not natural to this region. They were brought here in a feeble attempt to turn wetlands into real estate. Now the highly-flammable melaleuca trees are taking over 40 acres of everglades a day, and -
Blight: Can the lecture, MAL! Just tell me - am I the greatest or what?
MAL: Don't uncork the bubbly just yet, Snow Blight. There's a scients developing a new plant growth-enhancing ray. Soon, all will hail this doctor the most brilliant.
Blight: I've dealt with ancient wannabes in the past.
MAL: Newsflash! This doctor is no fossil! Georgina Carbor. Vibrant. Beautiful. And young. Mmm, I'd like to network with her.
Blight: Can it, disk-head!
Blight: You know, I couldn't ask for a better-looking test site.
MAL: Really? It looks denuded, deforested and desertified to me.
Blight: Exactly! So when I realise Carver's - I mean, MY test plant, it'll solve the erosion problem around here. And the scientific journals will fall all over themselves to interview me! Now, to add the Blight touch...
MAL: I tapped into Carver's computer. The enhancer ray should be used for only - repeat, only - three seconds.
Blight: If seconds are good, minutes are better!
MAL: Doctor, dear, I suggest you review the existing data.
Blight: Are you wimping out on me, MAL?
She turns the laser towards MAL.
MAL: No, let 'er rip!
MAL: Do you realise we were seconds away from annihilation?
Blight: Thrilling, wasn't it?
After witnessing that the vine is too powerful for Captain Planet:
Blight: MAL, change my little black book, would you? Change Captain Planet to Captain Planted!
Modelling her radiation suit in Deadly Ransom
Blight kissing MAL in Heat Wave
Blight and her force field over Hope Island
Making her escape in Heat Wave
Dr. Blight is decidedly feminine in the episode Don't Drink the Water
Dr. Blight brushing her hair in Don't Drink the Water
Spraying perfume in Don't Drink the Water
Painting her nails in Don't Drink the Water