Sidonie “Sid” Baker

**Sidonie Baker** was a supporting character played by Olivia Cooke in Season 1 of Apple TV+'s *Slow Horses*.

## History

Hobden, at a diner, talks on the phone, waiting for a fin to break and asks for 2000 words on the newspaper once the event that he is waiting for happens. Sid, next to him talks and asks if she could borrow his *Times*. When she gets up, she dumps coffee all over his table, which makes him get up quickly. When he leaves, she grabs his flashdrive and connects it to her computer.

Sid walks up to Lamb, who congratulates her on what she had done with Hobden. River asks what was on Hobden's flashdrive, but Lamb tells them to get out of his office. River wonders why they were both assigned to Hobden, but Sid reminds him that he was not really doing much.

River watches a video as he is approached by Sid, who startles him and tells him he looks like a mole. He tells her is is watching a video about Greg Simmonds and plays the speech for her, saying that he probably funded hate groups. She tells him there are better ways to spend his free time, saying that she had only come for her charger after getting drinks. He thanks her for the invite and she says that she has invited him before, but he has rejected the invites.

Lamb walks into Sid and River's office, saying that if people did not leave the building by 5 then he was not doing his job properly. He tells them that if he finds out they are taking part in extracurricular that activities that could ruin the balance of the Slough House, then he would make it so they wished they were in a Siberian gulag.

River makes it to the Slough House, wanting Roddy to check something for him. He hands Roddy a flashdrive and wants to know what he is looking at. Roddy says that he is looking at the number Pi, which makes Sid realize he had copied the files and Hobden had been expecting a snatch. Sid sees his injured hand and slaps it, but River tells her that if Park was looking into Hobden, they should be making an effort as well, but Sid wants to stay out of their way.

Roddy calls River and Sid, telling them that there was a hostage that had been picked up yesterday and had popped up on a Middle East chat a while ago. All the Slough House starts watching the video, which makes Lamb wonder why. He tells them that whatever was happening would be assigned to real agents, not them since they are fuckups. They wonder what they should do, but Lamb says that nothing. River tells Sid that Hobden's old crew was the British Patriotic Party and one of them might have something to do with it. It is announced that the young man's head would be cut off the next day, but Lamb tells that that changes nothing. He asks where River is however, but he was already gone.

Sid gets a call, which she does not answer and goes to her office where River is cleaning up the trash. River tells her that he wanted to find out if the USB stick had what the Park was looking for, but it was not. HE says that what he was doing could get him kicked out for good, but he has one lead which could possibly be bullshit.

River waits in a car, where he is joined by Sid, who tells him that she had been following him all day long. She asks what he found in Hobden's trash and he says that Ho predicted that Hobden would have turned his computer to ash and he found evidence to confirm this. He says that in order to get Ho to help, he would tell him why he was in Slough House. She asks him to break it to her because she knows that Ho is only there because he is an insufferable prick. River asks Sid if she believed that Roddy could find out why Lamb is in Slough House, but she says that he would already have done so. River asks Sid why she is there, since Lamb and he could see that she is not like the others. She says that the decision to go to Slough House came out of nowhere and is none of his business. He tells her that he is waiting for Hobden to sleep so he could steal his laptop.

River says that Hobden was calling many journalists. Sid gets a call from her Aunt Zadie, who had been calling her all day long. She does not reveal who Aunt Zadie is and says that there is a reason she did not tell him why she is in the Slough House. He tells her that she does not need to tell him because the only possibility of her being in the Slough House must have to do with her personal life. She says that it is his business, since she did not follow him today, but Taverner did. She also tells him that she is not watching Hobden, she is watching him. River laughs but finds out she is serious. She says that he is the reason she was assigned to Slough House and they see movement outside as someone tries to get into Hobden's apartment.

River walks in and hears struggling. A masked man with a gun is holding Hobden, so River tells him that there would be reinforces in minutes and if they saw him with a gun, they would just kill him. There is an explosion and River tries fighting the man, but is taken down. At the entrance, Sid struggles with the man. River hears a gunshot and rushes to the door, where he finds Sid had been shot in the head.