What is the name of the phenomenon in which planets of the Solar System line up in a row?

Spongle, correct, never heard or read of a planet 'parade' in my 40+ years as an amateur astronomer, sounds like some new-age hogwash to me! ;)

Lynne, Possibly “alienment “ rather than alignment

Mars V, Also in Lara Croft: Tomb Raider and I think also in one of the Thor movies . It pretty much presages the appearance of the baddest intergalactic space villain!

Nostromo, You should always remember as scientists information is never exactly as proclaimed. Just as one can play with words ( to mean or not mean ) what it says scientists can play said games with planets movements. eh. ! ! !

One is scheduled for February 2025

It happens in 2001: A Space Odyssey.

HAL 9000, me too… definitely alignment