Subsequently, Tamm played the characters of Penny Crosbie in the soap opera Brookside from 1993 to 1996, and Yvonne Edwards in the BBC drama Paradise Heights (2002), as well as guest roles in many other television programmes, including Crime Traveller on BBC1, another time travel drama. Tamm returned as Pandora in the second series of the Gallifrey audio plays produced by Big Finish Productions. Her first such appearance was in Gallifrey: Lies (2005). She also appeared (as herself) in a special feature in the 2007 DVD boxed set release of The Key to Time, discussing her experiences on the programme. In August 2009, Tamm made a brief one-week appearance as Orlenda in EastEnders. Reprising the role of Romana, Tamm recorded seven new Doctor Who audio adventures for Big Finish Productions with Tom Baker shortly before her death which were released in 2013 as season 2 of the Fourth Doctor Adventures.