Apparently, if something was NOT moving when the time stop took effect, then it is not affected by it. However, on an atomic level, everything is constantly in motion, so nothing should move at all, when the actors try to move it.
About 46:00 in, the lettering on Turner's go-cart for Harlington-Straker Studios is reversed indicating a flipped shot.
At the episode's start, when Straker corrects "time", it should be night, but daytime is shown.
In the ending credits, Ron Pember - playing the casting agent - is misspelled as Ron Bember, Jean Wladon (playing a studio actor) is misspelled as Jean Vladon, and John Lyons is credited as playing a studio guard instead of SHADO guard.
Most of this story is set in a time frame of one millionth of a second. Yet when Straker and Colonel Lake are outside chasing Turner (Patrick Allen) the sky changes from almost a clear blue one to cloudy in the same time frame. Also in some shots the ground is bone dry and in others there is evidence it has recently rained.
After Straker kills Turner whilst he's sitting in the small car, the shadow of a crew member, presumably operating the car, is visible to the front of it.
At 29m 21s the shado of the handheld camera operator is seen bottom right of frame. Visible again at 29m 28s.
It is not totally clear if time stands still or everything physical is frozen in space. Either way it should not be possible for a VDU (in the command center) to project a picture, this requires an electron scan to take place and light photons emitted.