Tonights episode is the last to star Preeya Kalidas as Amira Masood/Shah, she first appeared in 2009.
Tonights episode airs for an hour.
This 2-hander episode was produced outside of the normal episode production schedule, as Lacey Turner (Stacey Slater/Branning) (and the rest of the cast) was not aware she was the killer of Archie Mitchell until the live episode aired.
This is the last episode to broadcast this week as tomorrow night this years Sport Relief live event is broadcast from 7pm on BBC One.
This episode marks the last appearance of Pooky Quesnel in the role of Rachel Branning (Previously Sukie Smith in 2006), who has appeared on a recurring basis in 2007, 2008, 2009 and this episode in 2010.
A extended verse played over the last scene, with just a piano playing the theme tune, leading into the normal closing credit sequence.
Kate Williams reprises her recurring role of Liz Turner on tonights show, however isn't credited for her appearance.
No episode airs this Friday night, due to live rugby broadcasting on BBC One, instead, hence a additional episode airing on a Wednesday.
This episode marks the last appearance of Molly Conlin as Dotty Cotton, who's appeared since 2008. It also marks the first appearance of the recurring character Kamil Masood, however the actor(s) are yet to be crediited.
Scott Maslen (Jack Branning) clearly gets his words muddled, when talking to Max, Bradley & Stacey in the street.
Also June Brown (Dot Cotton) revealed she didn't say the correct line and forgot Dotty's (Molly Conlin) name.
Samantha Womack (Ronnie Mitchell) also left the shop without paying for the product she picked up off the shelf, walking out onto the street continuing her conversation with Rita Simons (Roxy Mitchell).
Lacey Turner (Stacey Slater) was originally meant to appear at the end of the episode with Diederick Santer and Larry Lamb, however due to throat problems, she had saved her voice for the live episode and had lost it throughout.
The former cast mates that make a speaking appearance are Larry Lamb (Archie Mitchell) and Daniella Westbrook (Samantha Mitchell). However sat at one of the tables at R&R, when George first presents from that location, Michael Greco (Beppe DiMarco) can also be seen sat down.
This episode originally aired on BBC Three live between 8.30pm and 9.30pm. It was repeated on BBC One on Sunday 21st at 4.00pm.
Tonights closing credits feature viewer submitted credits, as videos are cut into small squares and played behind the scrolling text and we hear them played in sync humming to the theme tune.
Tonights episode runs for a hour, ahead of the conclusion in the Archie's murder storyline tomorrow night.
A new BBC One ident premiered before the beginning of the episode, which see's the residents of the square come out of their houses/the Queen Vic and stand on the street looking up into the sky, as we zoom out the BBC One circle logo appears. This ident was used ahead of each episode this week.
The EastEnders title changes EastEnders 25 at the beginning and the end of each episode this week.
This episode airs 'In Memory of Wendy Richard MBE, 1943-2009', this text appears at the end of the credits, as Wendy passed away from cancer today.