Romana II travelled with the Doctor between Destiny of the Daleks and Warrior's Gate.

After the mission to find the Key of Time, Romana regenerated, apparently on a whim, and in the form of Atrios's Princess Astra who she and The Doctor had recently met.

Like her previous incarnation the new Romana was independent and self-assured, and ofted claimed to be smarter than The Doctor, but his relationship with her seemed far more avuncular. She appeared to be younger than before, and he treated her so, being far more protective of her than he was with the first Romana, and resenting her presence at the behest of the Time Lords. When they ordered her re-assignment he was as unhappy as she was, and when they ended up in Exo-Space instead of returning to Gallifrey both were glad of the delay in responding to the High Council orders. Eventually she decided to stay in Exo-Space with K9 as company to help the Tharils free themselves from slavery.

Lalla Ward was born Sarah Ward on June 28, 1951. She is the daughter of Edward Ward, the 7th Viscount Bangor, and his fourth wife Marjorie Alice Banks. She has a brother, Edward, two years her junior, and a half-brother, William, who is the 8th Viscount Bangor, and three years her senior.

She is descended from George Plantagenet, 1st Duke of Clarence, brother of Edward IV, via John Mordaunt, 1st Earl of Peterborough, John, 1st Viscount Mordaunt, and Bernard Ward, 1st Viscount Bangor.

But for all that ancestry, she attended the Central School of Speech and Drama in London, the same school that Christopher Eccleston, born in a terraced house in Salford attended.

Her stage name, "Lalla", comes from her attempts as a toddler to pronounce her own name. She began her acting career in the Hammer horror film Vampire Circus, and played the teenage daughter of The Duchess of Duke Street in the popular BBC drama series of the 1970s. In 1980, she played Ophelia to Derek Jacobi's Hamlet in the BBC television production.

She was chosen to replace Mary Tamm as the Time Lady Romana after a guest appearance as Princess Astra in the Doctor Who story The Armageddon Factor in 1979.

After she left the series in 1981, she married her co-star, actor Tom Baker, but the marriage lasted only sixteen months. Douglas Adams, who worked with her on Doctor Who, introduced her to his friend Richard Dawkins, biologist and author of such books as The Selfish Gene, The Blind Watchmaker and The God Delusion, whom he had met after Dawkins sent him a fan letter. They met at Adams' fortieth birthday party in 1992 – according to Adams they were the only guests who turned up on time and hence were obliged to speak to each other. She married Dawkins the same year.

Lalla illustrates her husband's books and also wrote two books on knitting in the 1980s, and one on embroidery. She created the 1985 Shell Calendar, with embroidered pictures of sea birds.

Lalla has seldom appeared on screen since her marriage to Dawkins. However, she has reprised the character of Romana in the 1993 charity special Dimensions in Time, the 2003 webcast version of Shada, and in several Doctor Who and Gallifrey audio plays produced by Big Finish Productions.

She has also recorded audio books, including Steven Pinker's The Language Instinct and Dawkins' The Ancestor's Tale and The God Delusion, in which she co-narrates with her husband.

She is joint chairman (with Geraldine James) of the Actors' Charitable Trust.

The Asteroid 8347 Lallaward is named after her.

TV and Film

"Doctor Who" (29 episodes)
The Armageddon Factor: Part 1 (20 January 1979) - Princess Astra
The Armageddon Factor: Part 2 (27 January 1979) - Romana
The Armageddon Factor: Part 3 (3 February 1979) - Princess Astral
The Armageddon Factor: Part 4 (10 February 1979) - Princess Astra
The Armageddon Factor: Part 5 (17 February 1979) - Romana
The Armageddon Factor: Part 6 (24 February 1979) - Romana
Destiny of the Daleks: Part 1 (1 September 1979) - Romana
City of Death: Part 1 (29 September 1979) - Romana
City of Death: Part 2 (6 October 1979) - Romana
City of Death: Part 3 (13 October 1979) - Romana
City of Death: Part 4 (20 October 1979) - Romana
The Creature from the Pit: Part 1 (27 October 1979) - Romana - Voice Of Ambaddor Erato
The Creature from the Pit: Part 2 (3 November 1979) - Romana
The Creature from the Pit: Part 3 (10 November 1979) - Romana
The Creature from the Pit: Part 4 (17 November 1979) - Romana
Nightmare of Eden: Part 1 (24 November 1979) - Romana
The Horns of Nimon: Part 1 (22 December 1979) - Romana
The Leisure Hive: Part 1 (30 August 1980) - Romana
The Leisure Hive: Part 2 (6 September 1980) - Romana
The Leisure Hive: Part 3 (13 September 1980) - Romana
The Leisure Hive: Part 4 (20 September 1980) - Romana
Meglos: Part 1 (27 September 1980) - Romana
Full Circle: Part 1 (25 October 1980) - Romana
Full Circle: Part 2 (1 November 1980) - Romana
Full Circle: Part 3 (8 November 1980) - Romana
Full Circle: Part 4 (15 November 1980) - Romana
State of Decay: Part 1 (22 November 1980) - Romana
Warriors' Gate: Part 1 (3 January 1981) - Romana
Warriors' Gate: Part 4 (24 January 1981) - Romana
Doctor Who: Dimensions in Time (1993) (TV) .... Romana
Doctor Who: Shada (1992) (V) .... Romana

Riviera (1987) (TV) .... Laura Grayson
"Schoolgirl Chums" (1982) TV Series .... Anastasia Devine
Hamlet, Prince of Denmark (1980) (TV) .... Ophelia
"The Professionals" .... Jill Haydon (1 episode, 1978)
- When the Heat Cools Off (1978) TV Episode .... Jill Haydon
"Hazell" .... Sarah Courtney (1 episode, 1978)
- Hazell Meets the First Eleven (1978) TV Episode .... Sarah Courtney
"The Duchess of Duke Street" .... Lottie (5 episodes, 1977)
- Ain't We Got Fun (1977) TV Episode .... Lottie
- Poor Little Rich Girl (1977) TV Episode .... Lottie
- Blossom Time (1977) TV Episode .... Lottie
- Lottie (1977) TV Episode .... Lottie
- The Legion of the Living (1977) TV Episode .... Lottie
"Who Pays the Ferryman?" .... Jo Hebden (1 episode, 1977)
- Some Talk of Alexander (1977) TV Episode .... Jo Hebden
Crossed Swords (1977) .... Princess Elizabeth
... aka The Prince and the Pauper (UK)
"Leap in the Dark" .... Antonie (1 episode, 1977)
- The Fetch (1977) TV Episode .... Antonie
The Ash Tree (1975) (TV) .... Lady Augusta
"Quiller" .... Tracy Fischer (1 episode, 1975)
- Thundersky (1975) TV Episode .... Tracy Fischer
Rosebud (1975) .... Margaret
Got It Made (1974) .... Tessa Carmichael
England Made Me (1973) .... Young Kate
"Van der Valk" .... Judith Stolle (1 episode, 1973)
- The Rainbow Ends Here (1973) TV Episode .... Judith Stolle
"The Protectors" .... Eva Anderson (1 episode, 1973)
- Bagman (1973) TV Episode .... Eva Anderson
"The Upper Crusts" (1973) TV Series .... Davina Seacroft
Shelley (1972) (TV) .... Harriet Shelley
Vampire Circus (1972) .... Helga