A quiet house in suburban Dunedin, New Zealand, is now home to a violent exterminator set on destroying any “impure” forms of life.

Macandrew Bay residents might be safer inside their homes because a six-foot (183cm) merciless Dalek, from the cult television show Doctor Who, is now operating in the area.

Sci-fi enthusiast Jason Connolly spent about 200 hours over the past three months building the life-size replica of the show’s most menacing antagonist in his workshop.

He said he had been a fan of Doctor Who in the late 1970s and early 1980s when Tom Baker was The Doctor, and more recently when David Tennant assumed the role.

When he visited a Doctor Who exhibition in Wellington, in October last year, it “reawakened” his love for the show and he decided to build a replica of a special 50th anniversary edition Dalek.

Most of the four-tier structure was built from scratch and was “a pain” to build, he said.

“The only [ready-made] thing that I’ve been able to stick in, is that plunger.”

Built on a modified mobility scooter, the Dalek moves using a wired remote and is big enough to fit a small-to-medium sized person inside.

However, Mr Connolly who is 1.93m tall and weighs 120kg, could not fit.

The machine also had bright blue and red lights attached to it, as well as a speaker for sound effects.

Mr Connolly had already been invited to display his Dalek at festivals in Christchurch and Auckland, and was keen to take it to events in Dunedin when possible.

He is a district nurse for Health New Zealand/Te Whatu Ora Southern during the day, and only built pop culture replicas for a hobby, he said.

When things were busy or he needed a bit of “quiet time” he liked to go into his workshop, have a cup of tea or a glass of wine and build things.

Mr Connolly said he was starting to run out of space to store his projects, which included a Storm Trooper, a full-sized Chewbacca suit and a samurai Batman suit.

So there was no danger of any more aliens popping up in the area.

“I don’t know if I can make anything else because we’ve got nowhere for anything else to go.”