Visible crew/equipment: When Milton arrives at the airport, the filming crew is reflected in the glass on the right.
Visible crew/equipment: When Sir John Landry walks towards the fireplace before Jessica unravels the mystery, stage lights are reflected on Jessica's glasses.
Visible crew/equipment: At the beach, when Miguel jumps in the helicopter, two filming lights are reflected on the windows.
Visible crew/equipment: When Jessica is on her horse at the barn, there's a crew member lying on the floor, watching out for Angela Lansbury.
Visible crew/equipment: When Jessica gets trapped in the car, lighting equipment is reflected on the window.
Death Takes a Curtain Call - S1-E9
Visible crew/equipment: When Jessica and the Russians exit the theatre, the whole filming crew and cameras are reflected on the car's fender.
Visible crew/equipment: Jessica is at the crime scene with the detective and walks from the back of the set to the cemetery. The moving shadow of the camera is cast on a rocky wall. (00:17:33)
Chosen answer: This is the very reason my brother and I used to jokingly call the show, "Murder, She Caused." It's amazing she was ever on anyone's guest list for a party, given the likelihood someone would end up deceased. As to your question, most of the time, Jessica Fletcher would have had an air-tight alibi, as she was in a room full of people, or her whereabouts were accounted for when a murder occurred elsewhere. It also seems to me that there were episodes where she, purely with respect to opportunity, could have been a suspect. I believe she even acknowledged that as a logical possibility from time to time, even though she knew, of course, she was not the killer. However, the investigation would obviously rule out the possibility of her involvement, eventually.
Michael Albert