Changes

Series 3 Episode 4 'Mad Dogs' was first broadcast on 6 April 1977 and featured the SVR. SVR News refers to filming at [[Highley]] station and [[Highley signal box |signal box]].<ref>SVR News 44</ref>. However a poor quality photograph appears to show [[LMS Stanier 8F 48773 | 48773 (as 8233)]] at [[Hampton Loade]]<ref>[http://www.survivors-mad-dog.org.uk/MDSevernLoc.html Survivors episode "Mad Dog" - Severn Valley Railway locations]</ref>. A detailed account of filming reiterates this as the location with filming on 27 January 1977. "When edited, the Severn Valley sequences would together account for just under five minutes of screen time (44:30 – 49:24)."<ref>[http://www.survivors-mad-dog.org.uk/Downloads/The_Making_of_Mad_Dog.pdf Rich Cross, '‘As dangerous dead as alive’, The making of Survivors Mad Dog'] (Retrieved 16 February 2017</ref>

Furthermore, the article states: "[Survivors’ producer Terry] Dudley had arranged for Survivors to make extensive use of the rail line in three series three episodes which would be recorded concurrently: Law of the Jungle, which had preceded Mad Dog, and Bridgehead, which was to follow it. (A short establishing shot of a train in motion, filmed during the making of Bridgehead would also later appear in the opening scenes of the series’ final episode Power)."