Our community members are treated to special offers, promotions and adverts from us and our partners. You can check out at any time. More info WARNING: This article contains spoilers from Beyond Paradise. As Beyond Paradise season three unfolds, fans are keen to discover who will be guest starring in the fourth episode. The spin-off of BBC's Death In Paradise is well into its third season with DI Humphrey Goodman (portrayed by Kris Marshall) once again at the heart of a perplexing investigation. In this instance, his fiancee Martha Lloyd (played by Sally Bretton) finds herself under scrutiny when it emerges that a sailor's smoothie has been tampered with prior to a significant race. Beyond Paradise season 3 episode 4 cast Polly - Madeleine Daly On the final day of the regatta, finalist Polly is competing for first place when "disaster strikes" as she collapses and falls into the sea, causing the entire race to descend into chaos. Actress Madeleine Daly will portray Polly, although not much is known about her beyond her role in Beyond Paradise. (Image: BBC) Hugo - Jason Hughes Actor Jason Hughes will play the part of Polly's "overbearing father" Hugo, who is eager for his daughter to win the trophy. Hughes is known for his role as Warren Jones in the 1990s drama This Life, but is perhaps more recognisable as DS Ben Jones in ITV's Midsomer Murders. In recent years, Hughes has appeared in Three Girls, Marcella, The Pact and McDonald And Dodds. Nathan - Silas Carson As one of the suspects in the drama, fellow dad Nathan is driven by the desire to see his daughter crowned champion but at what expense? The character of Nathan is portrayed by the esteemed actor Silas Carson, known for his roles in a multitude of television hits such as Doctor Who, The Gold, Unforgotten, Holby City, and more recently, as Jonathan Boardman in the BBC's Virdee. Francine - Laura Euler Rolle In the competitive dynamic of the show, Francine, portrayed by sailor Nathan's daughter, stands as Polly's chief adversary, which puts her in the hot seat for questioning especially after Polly encounters a shocking incident during the championship's finale. (Image: BBC) Actress Laura Eule Rolle takes on the role of Francine, and although she's relatively fresh to the acting world, her resume already includes appearances in productions like The Diplomat and Woman Of The Dead. Archie Hughes - Jamie Bamber Archie Hughes, who kept his distance in the second season after being rebuffed by Martha, has been making increasingly regular appearances. Jamie Bamber, the actor behind Archie, has an impressive repertoire including roles like Col Alexander Coltrane in Strike Back, DCI Tim Williamson in Marcella, DS Matt Devlin in Law And Order: UK, and Lee "Apollo" Adama in Battlestar Galactica. Lucy - Eva Feiler Another familiar face popping up is Nurse Lucy, girlfriend to Josh Woods played by Chris Jenks, whose presence becomes significant when Polly faces adversity in the midst of the sea challenge. Eva Feiler, stepping into the shoes of Lucy, has featured in a string of shows such as Urban Legends, Father Brown, The Crown, and We Were The Lucky Ones. Beyond Paradises third season airs weekly each Friday at 8pm on BBC One and BBC iPlayer.