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Mark helps an old nemesis escape a forced retirement by Capt. Newman by investigating a murder which resembles the work of the "Clown Killer.".
Mark, Jesse and Amanda are among the guests present at an elegant hotel that has been deliberately contaminated with a deadly microbe.
In an episode that elapses in real time, Mark and Steve must catch a serial killer in the hospital before the clock strikes nine.
When Jesse (Charlie Schlatter) rescues a beautiful woman (guest star Audie England), he inadvertently becomes the object of her deadly obsession. With Dick Van Dyke.
A gunman leaves notes prior to committing crimes, baiting Steve (Barry Van Dyke) over and over again. With Dick Van Dyke.
Steve tries to clear the name of a misguided teenager who is a suspect in the death of a fellow boxer.
When the Masked Magician is killed on live television, Dr. Sloan uncovers a murderous plot to obtain high ratings.