 Tristan Sturrock (qv) (Colin Hedges) broke his back during the  filming of the sixth series. Consequently, his character was  temporarily written out of the series and was absent for the final  four episodes except for a brief scene in the finale. Similarly, he  only appeared in the first six episodes of Series 7 before again  being written out temporarily. At the time of typing, it is hoped  that he will return for Series 8, although it is not certain.