Eagle-eyed fans noticed the hilarious blunder after Stacey (played by Lacey Turner) and Martin Fowler (James Bye) hopped on a London Underground train to get out of Walford.
And it soon became the Fowler express as Michelle (Jenna Russell) also got on and noticed her brother and sister-in-law sitting down.
The trio appeared in great spirits as they talked to each other, but many viewers couldn’t help but notice that the train didn't seem to have gone anywhere.
Taking to Twitter, one person wrote: “The #Eastenders Tube is hilarious. It never moves.”
Stacey and Martin Fowler hopped on the London Underground
Eagle-eyed viewers noticed the train wasn't moving
Another commented: “I’m sorry but I've never know a Tube train to stay stationary for that long! #EastEnders besides it doesn't look likes it moved anywhere!”
While one person noticed another blunder as the green District Line train that was used in the scene is no longer in service after being replaced earlier this year.
They wrote: “#EastEnders are using District line Tube stock which have been long scrapped, just like their orange seat buses.”
Viewers also recognised that many of the BBC one soap characters have made a frequent number of appearances on the Tube lately and earlier on in the week, Whitney Dean (Shona McGarty) was seen leaving on one.
Michelle Fowler also got on the tube and found Stacey and Martin EastEnders most memorable moments Mon, January 23, 2017
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Martin Fowler got stuck underneath a double-decker bus that crashed into the market
The Fowlers appeared to be having a great time catching up on the train
Whitney Dean was also seen on the tube leaving Walford earlier in the week
One person asked: “How come the Tube is getting a weekly appearance on eastenders all of a sudden?”
“Why is it all of a sudden in every episode of #eastenders we are seeing people on the Tube !?!?!? @bbceastenders,” questioned another.
EastEnders continues tonight on BBC One at 8.00pm.