IBM Portable Personal Computer in Deutschland 83 - Season 1, Episode 3, "Atlantic Lion" (2016)
Overcoming a Comecon embargo, the East Germans get hold of an IBM Portable PC 5155 (which they call an IBM 567) to try to access a disc containing a NATO report on a possible nuclear strike, but find its contents are encrypted.
The PC 5155 was released in 1984, this is set in 1983.
Looks like it is running either cassette BASIC, Disk BASIC or BASICA with a simple program running.
The BASIC program shown generates 64 random five digit numbers in six columns, i.e. the "encrypted" contents of the disk we just saw.
The soundman used different sounds to give a little audio thickness to the scene and we distinctly hear the start-up sound of a first generation Apple Macintosh, mixed with the authentic noises of the 5"1/4 floppy disk drive involved in the scene. Of course, this is 1983, there is no Macintosh to be seen, back then the Lisa had just been released.