- Robb Stark: "We will do whatever we can to give Lord Frey what he needs."
- Black Walder Rivers: "Not "what". Whom."
- — Robb Stark and Black Walder[src]
Walder Rivers is a recurring character in the third season. He is portrayed by Tim Plester. Walder is known as "Black Walder" for his temper and demeanor. He is a natural born son of his namesake Lord Walder Frey, Lord of the Crossing and head of House Frey.
Black Walder and Lothar Frey are sent to Riverrun by Lord Walder Frey to negotiate with Robb Stark the terms for the Frey's re-entry into the Northern army. Black Walder bluntly demands that Harrenhal and all its attended lands to be inherited by House Frey for Robb Stark's "betrayal" in breaking his oath. Black Walder further demands that Edmure Tully be engaged to one of Lord Walder Freys's daughters, with the pair to be married within the fortnight due to the fact that Lord Walder had become wary of long engagements after his recent experience with Robb Stark. Before taking their leave, the pair demanded a response to their terms before they departed for the Twins the following morning. 
During the aftermath of the Red Wedding, Catelyn Stark murders Walder Frey's wife by cutting her throat in grief of Robb's death after Roose Bolton stabs him through the heart with a dagger. Catelyn lets out a wail of tears and remains silent for a moment, before Black Walder steps behind her and cuts the woman's throat and walks away as the blood spews out of her. 
|Season Three appearances|
|Valar Dohaeris||Dark Wings, Dark Words||Walk of Punishment||And Now His Watch is Ended||Kissed by Fire|
|The Climb||The Bear and the Maiden Fair||Second Sons||The Rains of Castamere||Mhysa|
and numerous mistresses
|Walder Frey||Joyeuse Frey|
|Stevron Frey||"Lame Lothar" Frey||Roslin Frey||Edmure Tully||"Black Walder" Rivers||Ryger Rivers|
|Roose Bolton||"Fat Walda" Frey|
In the booksEdit
"Black Walder Rivers" in the TV series is apparently a composite of two different Frey characters from the A Song of Ice and Fire novels: "Black Walder" Frey (who is Lord Walder's great-grandson) and Walder Rivers (Lord Walder's eldest and most prominent bastard son). The character who appeared in the TV series was named as "Black Walder" in Season 3, though the HBO Viewer's Guide referred to him as a bastard son, not a trueborn great-grandson. The updated Season 4 Viewer's Guide website clarified this by identifying him as "Black Walder Rivers".
Black Walder FreyEdit
Black Walder's father, Ryman, is the eldest son of Ser Stevron Frey, who is himself the eldest son, and heir, of Lord Walder Frey. Thus Ryman's three sons - Edwyn, Black Walder, and Petyr - are the presumptive future heirs of House Frey (which includes over a hundred direct descendants of Lord Walder). At the beginning of the first novel, Black Walder is fifth in line to succeed Lord Walder, behind his grandfather Stevron, his father Ryman, his older brother Edwyn and Edwyn's daughter Walda. While Edwyn is ahead of Black Walder in the line of succession, he is not a fierce warrior like Black Walder is, and the two of them are constantly jockeying for power and favor within the family. As a result, Black Walder is one of the more prominent members of House Frey.
Black Walder is a stout and wiry man with a black beard, who inspires terror in those around him. Black Walder is known to be resolute and easy to anger, being feared by many among his own family. He is rumored to have maintained numerous affairs with several women, including cousins and the wives of his close relations. In particular, it is strongly rumored that Black Walder had an affair with Lord Walder's seventh wife, Annara Farring, and that he is the true father of all six of her children (including Shirei Frey, allegedly Lord Walder's youngest daughter).
Black Walder took part in the Red Wedding. Prior to the massacre, Robb remarked to Catelyn that he was surprised that despite his normal disposition, Black Walder was acting like a lamb during the festivities - not realizing that for Black Walder to behave so out of character was a hint that he was trying too hard to allay the Starks' suspicions that the Freys were planning something. Prior to the wedding, Black Walder had gone so far as to remark that his sisters would not be loathe to marry a widower - implying that they should simply kill Robb's new wife so he would be free to marry a Frey girl again. Robb said he would have killed Black Walder for such an insult, but his wife begged him to show mercy.
During the chaos of the resulting massacre in the feast hall, Catelyn catches a quick glimpse of Black Walder hamstringing a member of House Vance (one of the Tullys' other vassals).
Another difference with the TV series is that neither Black Walder (who was in the main hall) nor Walder Rivers (who was off fighting in the camps outside) personally killed Catelyn Stark. Instead, Catelyn was so devastated by seeing Robb killed in front of her that she went mad, crying and laughing hysterically, and clawing away strips of flesh from her face. The surrounding Freys were so horrified that one of them openly asks for someone to kill her quickly to put her out of her misery (despite the fact that Tywin Lannister had wanted Catelyn taken alive). The man who slit her throat in the books was Raymund Frey, Lord Walder's eleventh son, the sixth son born out of his wedding to Amarei Crakehall. Raymund Frey is a fairly minor character, however, and other than slitting Catelyn's throat he has no other appearances or role within the narrative. Therefore, the TV series simply gave the role of slitting Catelyn's throat to Black Walder, given that he was also in the main hall in the books - and then Black Walder was combined with Walder Rivers to make "Black Walder Rivers".
Ser Walder Rivers is the eldest and most prominent of Lord Walder Frey's bastard offspring. He is a gruff, dour man with grey hair. Though not a trueborn Frey, he is often put in positions of responsibility for the house due to his strong reputation as a warrior.
His personal coat of arms follows the tradition of heraldry for bastards by reversing the colors of his noble parent's House: a silver-grey castle on blue beneath a red bend sinister. The TV series changed the House Frey Heraldry: in the books, it is the two towers and bridge of the Twins colored blue, on a silver-grey background. The TV series made the towers white, and over the same grey field, but now above a blue escutcheon which is drawn to resemble the waves of the Green Fork of the Trident River. The color change may be because after the blue river was added as an escutcheon at the bottom, it would have been visually confusing to have the castle be the same color as the water. Unfortunately this makes the Frey sigil in the TV series resemble the reversed color-scheme used by bastards in the books. If the TV series were to follow the same scheme of reversing the established color-scheme of a sigil for bastards, Walder Rivers' sigil would be a blue castle on a silver-grey background.
In the books, it is Walder Rivers who accompanies his half-brother Lame Lothar to Riverrun, not Black Walder.
During the Red Wedding, Walder Rivers commanded the assault on the Stark soldiers' camps outside of the Twins.
- Black Walder Frey on A Wiki of Ice and Fire (MAJOR spoilers from the books)
- Walder Rivers on A Wiki of Ice and Fire
- Raymund Frey on A Wiki of Ice and Fire
|Lord:||Lord Walder Frey||Heir:||Ser Stevron Frey|
|Seat:||The Twins · Riverrun||Lands:||Riverlands|
|Title(s):||Lord of the Crossing · Lord of Riverrun|
|Current members:||Arwaya Frey · Derwa Frey · Freya Frey · Janeya Frey · Lothar Frey · Marianne Frey · Merry Frey · Neyela Frey · Olyvar Frey · Roslin Frey · Sarra Frey · Serra Frey · Shirei Frey · Walda Frey · "Fat Walda" Frey · Waldra Frey · Waldron Frey · Ryger Rivers · Black Walder Rivers|
|Deceased members:||Joyeuse Erenford|
|Household:||Malcolm · Talbot|