A voodoo priestess animates her dead son to take revenge on the gangsters that killed him.

A bizarre alien presence invisibly sweeps through Chicago, killing a petty thief and a UFO nut. The alien or aliens have the strength of a hurricane, generate a massive electromagnetic field, steal lead and electronic equipment, and suck the bone marrow out of humans and animals alike. Kolchak must track the alien(s) from an electronics warehouse to an observatory to Lincoln Park and drive them off before they kill again. His camera seems to hold the key to the creatures' weakness, although initially Carl is wrong in guessing what the weakness is. Carl follows the aliens and manages to keep them from feeding on him before they depart once and for all.

A series of mysterious deaths plague the life of conductor Ryder Bond. In each case, the victim is incinerated by supernaturally hot flames. As Kolchak investigates, he finds out that an arsonist, Frankie Markoff, was a fan of Bond's, and was killed in a penny arcade. His funeral procession crossed Bond's car, allowing the spirit to become a ""doppelganger"" and try to take over Bond's life. Each victim was burned to death when they fell asleep, and if Bond goes to sleep the doppelganger will take him over for good. Fighting sleep himself, Kolchak must exhume Markoff's body and reunite it with his restless spirit before he too bursts into flame.