List of Kat &amp; Alfie: Redwater characters
Alfie Moon is played by Shane Richie. The character originally appeared in the soap opera "EastEnders" from 2002 to 2005, and 2010 to 2016. Before his departure from "EastEnders", he discovers he has a mass on his brain. Of Alfie's part in "Redwater", Richie said, "Alfie's journey is to help his wife find her son but at the same time he has his own dark secret which he's keeping." Richie later said, "For the first time in 15 years, [Alfie] questions himself as a father, a husband and as a life, it feels like it's coming to an end for him. [...] Alfie starts getting hallucinations and one in particular is quite harrowing."
Kat Slater
Kathleen "Kat" Moon (also Slater) is a fictional character from the BBC soap opera "EastEnders", played by Jessie Wallace. She is also played by Kate Peck in a flashback in 2001 and Sumar-Elise Sandford in a flashback in 2018. Kat is the second eldest Slater family sister and first appears on 18 September 2000. Kat is described as "a bit of a floozy", "a bitch" and "very lazy". The "EastEnders" website says that as soon as Kat arrived in Walford with her "fake tan, heavy make-up and hoop earrings", viewers would know that Kat would bring a dose of "Viagra to the men of Albert Square". Wallace did not appear in the show between November 2004 and May 2005 following a period of maternity leave, and Kat later left the soap on 25 December 2005. Wallace reprised the role in 2010 and Kat returned on 17 September. She took leave from the soap again between January and June 2012. The character departed the soap again in May 2015, returning briefly between December 2015 and January 2016. Wallace reprises her role as Kat in the six-part spin-off series "" in 2017. Following the confirmation that "Kat & Alfie: Redwater" would not return for a second series, it was announced that Kat would return to "EastEnders"; she returned on 22 March 2018.