Is Teddy in EastEnders really a killer? Is Shireen even dead? All the fan theories over Nicola’s murderous bombshell

What actually happened to Shireen?

Nicola Mitchell dropped a bombshell in last night’s EastEnders episode (Wednesday, March 12), revealing that Teddy was responsible for Shireen’s death. This shocking confession left Zack shaken and sparked plenty of intriguing theories.

According to Nicola, Teddy killed Harry’s girlfriend, Shireen Bashar, seeing her as a danger to the family.

But was she actually telling the truth? Here are the biggest theories surrounding her dramatic revelation.

EastEnders Theories:

1. Shireen Might Still Be Alive

Although Nicola claimed that Teddy killed Shireen, there’s a chance she wasn’t telling the truth.

Shireen vanished four years ago, but her fate remains unclear. What if she never actually died?

One theory speculates: “I want to know why Shireen was supposedly killed—if she’s even dead? If she cheated on Harry, death seems like a drastic response, I don’t know.”

2. Nicola Could Be the Real Killer

Another theory suggests that Nicola may have shifted the blame onto Teddy to cover up her own crime.

If Nicola was responsible, she would naturally have all the details of what happened.

A fan on X proposed: “I think Nicola is lying and she either killed Shireen or was behind her disappearance.”

Could Nicola actually be the true culprit?

EastEnders: Shireen Theories

3. Teddy Killed Someone Else

Teddy has already shown his violent side, especially when he attacked Zack after Sharon’s affair with Grant was exposed. And that’s before he even learns that Zack is actually Barney’s biological father…

One fan believes Nicola wasn’t wrong to blame Teddy for a murder—but not Shireen’s. Instead, they suspect he has killed before, just not her.

Their theory states: “I think Nicola is telling the truth about Teddy being a killer, but she’s probably lying about Shireen.”