Search for a kidnapped Professor using his temperamental time machine. You must first locate this contraption, and then use it to travel through time in a somewhat haphazard fashion to uncover three glass prisms, each hidden in a different era of Earth's history. Locations include the brig of a deserted sailing ship and the treacherous sands of Egypt.

Once in possession of all three prisms, you can control the time machine.

I found this the easiest of the "Mysterious Adventures" series - which by no means detracts from it, but the competent Adventurer should complete this in an evening or two. The presentation is the customary split-screen, the top half displaying the graphics and location description, the bottom for questions and instructions.