EastEnders fans are predicting a significant DNA twist for the Mitchell family.
Last week, new members of the Mitchell family arrived in Walford: Teddy and his sons Harry and Barney. Teddy is the son of Stevie, who first appeared on screen in January seeking reconciliation with estranged son Billy Mitchell.
However, Phil Mitchell - Billy's cousin - warned him to stay away after having surrendered into care as a child. From the age of ten, Billy grew up in care after Stevie took sole custody of his brother Charlie. The pair last saw each other off-screen over 25 years ago.
Fast forward to more recent times, and Stevie showed up again. However, it was revealed that he has a secret family, a son and two grandsons - who soon arrived in Walford.
And in shocking scenes last week, in front of the Mitchell clan Stevie shared all: Billy and Teddy are half-brothers. He revealed to Billy that Teddy had been the product of a fling, reports the Daily Star.
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However, at the end of the episode, things took a suspicious turn, when Teddy cornered his dad and warned him: "Why'd you tell him Mum was just a fling? " He then quipped: "Whatever you're hiding, it'll come out in the end."
And fans have been left feeling even more suspicious after watching the latest iPlayer episode on Monday (July 1). During a scene in the cafe, Teddy met up with Billy, Honey, Stevie and Phil.
And in a bid to get to know his new family more, Teddy quizzed Phil on some Wimbledon tickets he had previously mentioned. Phil was reluctant to engage in conversation with Teddy and promptly exited the scene. Stevie, who had been observing the situation, berated Teddy as he took a seat.
"I'm trying to build bridges here son, so if you're worried about me, don't burn them down! " He declared. Then, seemingly hinting at a significant DNA revelation, Stevie added: "It ain't just Billy who's blood."
Viewers were quick to respond to Stevie's 'shocker', speculating that Billy and Phil might actually be brothers rather than cousins. This would mean that Phil's son Ben and Billy's granddaughter Lola, who have a daughter together, Lexi, are second cousins.
On X, previously known as Twitter, one user exclaimed: "Oh don't you even dare #EastEnders... #EricWho #LexisIncestIncrease. Another person commented: "So they're potentially making Phil Grant and Sam Billy's half sib?"
"A third speculated: "It's gonna be Phil isn't if ffs." Yet another viewer chimed in, stating: "It's all complicated and inbred lol." A fifth disgruntled fan wrote: "omg please say sike this AINT it quit messing with soap history ffs."
EastEnders airs Monday to Thursday at 7.30pm on BBC One and BBC iPlayer