EastEnders casts Dot Branning's sister. CHAIN-SMOKING Dot Branning is set for a tearful reunion with her long-lost sister on EastEnders. The laundrette worker, played by June Brown, will be seen trying to get in contact with her sister Rose after a row caused the pair to lose touch years earlier.Dot hasn't seen Rose, who will be played by 67-year-old ex-Eldorado actress Polly Perkins, after her sister bedded the Albert Square veteran's con-artist first hubby Charlie Cotton.