Channel 5's Number One Fan ending explained: what happened to Donna and Lucy?

That shocking twist unpacked.
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Channel 5

Major spoilers for Number One Fan ahead!

We’ve been seriously spoiled for television lately. From Netflix’s Should I Marry a Murderer? to the explosive season three finale of The Capture, the culty chaos of Unchosen and ITV’s slick spy thriller Secret Service, it’s been a golden age for staying in and cancelling plans. Oh, what a time to be a subscriber, right?

Most recently, though, our attention has been firmly locked on Channel 5’s Number One Fan. The psychological thriller premiered on 4 May and had us hooked within minutes.

Starring the legendary Jill Halfpenny and Sally Lindsay, the series dives into the dark side of obsession and fandom. Halfpenny plays daytime TV presenter Lucy Logan, while Lindsay takes on the role of Donna, an unnervingly devoted, and increasingly unhinged, fan.

Over just four episodes, Number One Fan delivered a whirlwind of twists, tension and genuinely shocking moments. Here’s a full ending explainer for Number One Fan, breaking down exactly what happened to Donna and Lucy by the final episode.

What happened to Ben Hughes?

Ben Hughes was a gambling addict trying to turn his life around when he appeared on Stewart Jones’ show The Verdict. Instead of support, he was publicly humiliated on air and branded “Britain’s Biggest Loser.”

Following the segment, Ben left the set in distress. Stewart then ordered young assistant Lucy Logan to bring him back on air or risk losing her job. Under pressure, Lucy confronted Ben and became increasingly forceful, ultimately accusing him of being a paedophile and threatening to run a separate exposé outing him if he refused to return to the studio.

He promptly left the studio and jumped in front of a train, killing himself instantly.

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Channel 5

Why did Donna want revenge on Lucy?

Ben was Donna’s brother, and she blames both Stewart and Lucy for his suicide. In her eyes, Ben had been trying desperately to turn his life around, only to be destroyed by what happened on air.

Determined to get justice for him, Donna becomes consumed by grief and anger. In her pursuit of retribution, she begins to cross moral lines of her own, becoming, in effect, the human embodiment of karma, and committing her own crimes in the process.

What happens to Lucy?

In the final episode, Lucy is reported missing, only for it to be revealed that Donna has abducted her and is holding her in hiding.

Donna orchestrates events so it appears as though Lucy has taken her own life, as part of a meticulously calculated plan to cover her tracks.

Tied up in Donna’s home, Lucy finally gives the heartfelt apology Donna has been waiting for. She says: “What happened to Ben was deeply wrong. I think I was so consumed by my ambition that I would have done or said anything. I couldn’t be more ashamed. I’m sorry it’s taken me so long to take responsibility. What I said to Ben was cruel and sick. Your brother’s dead and I pushed him to it.”

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Channel 5

Viewers are left questioning whether this apology will ever be enough for Donna, or whether she intends to kill Lucy anyway.

After hearing her out, Donna unties Lucy and tells her she may still have a way of “salvaging her reputation” and “getting her career back.” There’s also something in it for Donna, too. She lays out a plan to "make Stewart Jones pay for what he did."

Why does Donna partner with Lucy? Perhaps she finds her less guilty than Stewart, or perhaps she knows she can improve her life as well through the partnership. Lucy is simply more useful to her than Stewart.

What happens to Stewart?

Donna then turns her attention to Stewart, carefully engineering a situation that leads directly to his arrest.

She phones him — by now a disgraced, cancelled has-been — and pretends to be “Jemima from GB Now”, offering him a job opportunity. Lured out of the house to meet her, Stewart leaves just as Donna and Lucy break into his home.

Inside, they stage the scene, leaving Lucy restrained. However, the bindings are deliberately loose enough for her to eventually call the police for help.

The result is a perfect setup: Stewart is framed for Lucy’s abduction. Quite why he would have wanted to kidnap her is never fully explained, but the damage is done. He is arrested and later sentenced to 10 years in prison for abduction and false imprisonment.

Only Donna and Lucy know how carefully the situation was orchestrated. It becomes a secret that binds them together, whether Lucy wants it to or not.

What happens to Donna?

We then jump forward six months, where a newly single Lucy is back on television. Her role in Ben Hughes’ death has been conveniently erased from public memory, replaced instead by a new narrative: she is now positioned as a victim of Stewart Jones. But there’s a twist: she has a new co-host… Donna.

Donna now appears on Lucy Logan Live with her own segment, Daily Dose of Donna.

After effectively giving Donna her 15 minutes of fame, Lucy decides she’s had enough and tries to edge her off the programme. But Donna isn’t so easily removed. She still has one final ace up her sleeve, one that ensures Lucy can never truly cut her loose, and guarantees she’ll remain firmly under Donna’s control.

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What did Jacob do?

Like Lucy, her son Jacob had also done something unforgivable, leaving blood on his hands. And Donna hadn’t just known about it, she’d actively played a part.

Did you guess it already?

As some viewers had begun to suspect, Jacob’s climate change activist boyfriend “Vince” was never really Vince at all. He was, in fact, Donna’s nephew — Ben’s son, Luke — who had been posing under a false identity in order to get close to Jacob. Over time, he manipulated Jacob into taking extreme action, ultimately encouraging him to firebomb a fuel depot as a political protest.

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Channel 5

But the situation spiralled far beyond anything they intended. A security guard was caught up in the blast and left in intensive care, with their survival uncertain. And, crucially, Luke had recorded everything.

Armed with clear evidence of Jacob’s involvement in the incident, Donna ensures Lucy has nowhere left to turn. To protect her son, Lucy is forced into silence and compelled to continue presenting alongside Donna, maintaining a strained, performative smile on air while privately trapped in her grip.

What a journey.

Watch Number One Fan on Channel 5.