|Mrs. S, S|
|Full name:||Siobhan Sadler|
|Manner of Death:||Shot in the heart by Ferdinand Chevalier|
|Also known as:|| Mrs. S |
|Significant Other/s:||John Sadler (husband) †|
|Family:|| Sarah Manning (foster daughter/genetic maternal aunt) |
Felix Dawkins (foster son)
Kira Manning (foster daughter / genetic maternal half-sister)
Kendall Malone (mother) †
Leda Clones (genetic maternal aunts)
Castor Clones (genetic maternal uncles)
|Portrayed by:||Maria Doyle Kennedy|
|Season/s:||1, 2, 3, 4, 5|
|First appearance:||"Natural Selection"|
|Latest appearance:||"To Right the Wrongs of Many"|
Siobhan Sadler, known as Mrs. S or simply S by some, was the foster mother of Sarah Manning, Felix, and Sarah's daughter Kira. She was the daughter of Kendall Malone, whose genes the Castor and Leda clones were derived from.
Siobhan is from Ireland, but lived in London around the time she adopted both Sarah and Felix. She then took them from London to Canada, leaving behind her friends.
Mrs. S gave up a lot to raise them and Sarah has apparently never shown an ounce of respect or appreciation for her sacrifices. Their relationship is estranged, even more so after Sarah left Kira with her for almost a year. When Sarah returns, Mrs. S refuses to give her custody of Kira.
Mrs. S is tough for a reason. While at first she seems like an obstacle, she has much to reveal about Sarah's origins. At the end of season 1 it is implied that Mrs. S is somehow connected to the experiment conducted on Sarah and the other clones - namely Project LEDA.
Mrs. S is seemingly the first person Sarah contacted upon returning to town. Sarah asked to see Kira, but Mrs. S, disappointed at Sarah for disappearing for almost a year and unsure about Sarah's ability to properly care for Kira, refused.
In "Natural Selection", After Vic finds out about "Sarah" committing suicide, he contacts Mrs. S and invites her to the memorial service. When they arrive, Sarah is watching from afar and is distressed when she sees that Kira is with her. Felix sends them away.
In "Instinct", Felix visits them for Sarah, and Mrs. S expresses her disapproval when Felix tells her that Sarah had faked her death to get rid of Vic (though was not surprised, as she did not believe that Sarah would have killed herself). When they talk about Kira, Mrs. S says that Sarah hasn't seen Kira for almost a year, and that it may be best if it stays that way. They are interrupted by an eavesdropping Kira, and Mrs. S lets Kira repeat what she seems to have been telling her for so long: that Sarah will come "when she's ready", and when Mrs. S says she's ready.
Eventually, she agrees to finally let Sarah back back into Kira's life after Sarah, who she later learned was in fact Sarah's clone Alison, proved that she was dedicated to sorting out her life for her. While Sarah initially intended on running away with Kira and Felix, when she saw how happy her daughter was with Mrs. S, she changed her mind.
Mrs. S' peaceful life was suddenly changed when Sarah told her about her recent problems, particularly her clones and the people after them, making it easier for both of them to understand the situation when Kira was then injured after getting hit by a car when she was lured out of the house by another clone. Some time after, while Kira recovers, the police, led by Beth's partner Art, storm into their house looking for Sarah. Mrs. S was among the people they interrogated about Sarah.
When Sarah's birth mother Amelia arrives, Mrs. S is suspicious of her and warns Sarah, while Amelia also warned Sarah about Mrs. S. After Sarah stood up to Rachel Duncan and refused her terms, Sarah came home to find Mrs. S and Kira missing.
Mrs. S is a compassionate, intelligent, but tough individual. She firmly puts the welfare of Kira ahead of her own interests, and did the same for her foster children, who still grew up to be mostly amoral and undisciplined adults. She is obviously protective of children in general, and has espoused left wing poilitics, gently ribbing Sarah that although Sarah inherited the love of Punk Rock from Mrs S, she did not inherit any of the political thinking.
|Season 1 appearances|
|Natural Selection||Instinct||Variation Under Nature||Effects of External Conditions||Conditions of Existence|
|Variations Under Domestication||Parts Developed in an Unusual Manner||Entangled Bank||Unconscious Selection||Endless Forms Most Beautiful|
|Season 2 appearances|
|Nature Under Constraint and Vexed||Governed by Sound Reason and True Religion||Mingling Its Own Nature With It||Governed As It Were By Chance||Ipsa Scientia Potestas Est|
|To Hound Nature in Her Wanderings||Knowledge of Causes, and Secret Motion of Things||Variable and Full of Perturbation||Things Which Have Never Yet Been Done||By Means Which Have Never Yet Been Tried|
|Season 3 appearances|
|The Weight of This Combination||Transitory Sacrifices of Crisis||Formalized, Complex, and Costly||Newer Elements of Our Defense||Scarred by Many Past Frustrations|
|Certain Agony of the Battlefield||Community of Dreadful Fear and Hate||Ruthless in Purpose, and Insidious in Method||Insolvent Phantom of Tomorrow||History Yet to Be Written|
|Season 4 appearances|
|The Collapse of Nature||Transgressive Border Crossing||The Stigmata of Progress||From Indistinct to Rational Control||Human Raw Material|
|The Scandal of Altruism||The Antisocialism of Sex||The Redesign of Natural Objects||The Mitigation of Competition||From Dancing Mice to Psychopaths|