Bluey fans go wild over mystery ending of the surprise episode as they try to decipher its meaning

Bluey fans are scrambling to decipher the meaning behind the mystery ending of the beloved children's show's surprise episode.

Creators of the Aussie animation sent fans wild this week when they dropped a secret episode, aptly titled The Surprise, on ABC on Sunday without any notice.

It came after viewers thought season three came to an end with The Sign the week before, pulling in 2.2 million viewers in Australia, ahead of the show's planned hiatus.

However, creators have now sent puzzled fans into a tailspin as they teased Bluey's future in the mysterious ending of the surprise season three finale this week.

The Surprise saw Bandit trying to play two different games with his kids, as Bluey kept surprising him with a ball blaster, while Bingo wanted him to babysit her pretend babies.

Bluey fans have gone wild trying to decipher the meaning behind the mystery ending of the beloved children's show's secret episode, titled The Surprise, which dropped this week 

But Bluey decides to end her game of ambushing Bandit when she hears him telling one of Bingo's babies that his family will always support him in a sweet message.

The episode then ends with a flash forward, which shows an adult Bluey visiting her parents at their beloved Queenslander home, which was almost sold in The Sign.

Chilli opens the door to her daughter Bluey, who says she thought she'd 'pop by', and the family go into the kitchen to join Bingo, who is already at their home.

The doorbell then rings again and, though it at first seems like nobody is there, a pup is seen cheekily hiding behind the door waiting to ambush Bandit with a ball blaster.

The adorable full-circle moment sent fans into a complete tailspin as they tried to work out who the mystery pup was and what it could mean for the beloved family.

The Surprise saw Bandit trying to play different games with his kids, as Bluey kept surprising him with a ball blaster (above), while Bingo wanted him to babysit her pretend babies

Bluey decides to end her game of ambushing Bandit when she hears him telling one of Bingo's babies that his family will always support him in a sweet message

Taking to social media, fans shared their theories that the pup is Bluey's child and speculated that Mackenzie is the father as they commented on the pup's ears.

They wrote: 'Hot take, but Mackenzie is very clearly the father of Bluey's kid. I know lots of people want Jean Luc to be the dad, but the pup's fluffier fur, markings, one floppy ear, and coloration all indicate a blue heeler/border collie mix';

'That pup belongs to Mackenzie and no one can convince me otherwise'; 'After the recent episode of Bluey, I'm still Team Jean-Luc. I don't think it will be, but I'm rooting for that pup';

'I watched the latest Bluey episode that dropped in the UK today; that little pup at the end was definitely a Bluey and Mackenzie pup, right?'

In a flash forward, adult Bluey visits her childhood home and as Bandit answers the door, a mystery child is seen hiding behind the door - waiting to ambush Bandit with a ball blaster

Fans took to social media to speculate whether the mystery pup is Bluey's own child in a signal at her future, or if the little one could be Bingo's baby 

Some fans theorised that it wasn't Bluey's child, but Bingo's, while other viewers thought it was Aunty Brandy's child, after her pregnancy was revealed in The Sign.

Fans were left completely stunned when ABC dropped the surprise episode this week, ahead of the show's plans to take an extended hiatus.

The broadcaster went to extreme lengths to conceal the secret episode, even listing it as a rerun on TV listings, before shocking fans with the brand new instalment.

The episode came a week after the Heeler family put their house up for sale in The Sign, sparking panic from parents and fans that the series could end.

There were fears Bluey could end after the family put their Queenslander home up for sale, but they didn't go through with the sale, and producers have assured fans Bluey will be back 

But the family did not go through with the planned move at the end of the episode, with The Surprise then confirming that they were still living in the same home. 

Bluey producer Sam Moor also stressed the show would be returning in the future and planted a little Easter egg for Sunday's episode.

'It is the question on everybody's lips. No, it is not the end for Bluey. I'm sure we have many more surprises in store for you,' she told BBC radio 4 last week.

Bluey is broadcast in more than 60 countries. The Emmy-award winning cartoon is the second most popular streaming show in the US.