Live stream: You can watch the match live via FuboTV.
Real Madrid defender, Achraf Hakimi has revealed that the club's players still do not know exactly why former boss, Zinedine Zidane left the Spanish capital club.
In temporary coach Santiago Solari's first Champions League game in charge Real began slowly but were out of sight before halftime after a clinical masterclass of finishing.
Benzema doubled his tally and set up Gareth Bale in the space of 144 seconds towards the end of the first half, and Toni Kroos floated a attractive 67th-minute chip home to wrap up the win and leave Plzen playing exclusively for third place.
Viktoria, who are now winless in 10 Champions League matches, attempted to make a good fist of it as Jan Kopic and Hrosovsky both got away shots in the opening 10 minutes of the second half that Thibaut Courtois - preferred to Keylor Navas here - had to deal with. "Sometimes, (Petr) Cech played in the league and me in Europe". Another clean sheet should also be a badly needed boost of confidence for the injury-hit defence.
Benzema then narrowly missed Bale's cross just in front of a gaping goal.
More shoddy defending from Plzen enabled Casemiro to glance Kroos' corner home, before Benzema took his tally for Madrid to 201 by nodding Bale's cushioned header past Hruska.
Things could have turned out much differently on the night as Real initially struggled in an unorthodox 4-3-3 formation that had Dani Ceballos - in for Luka Modric in one of two changes - fielded just behind Karim Benzema. Number 201 came from closer range, while the back-headed assist for Bale was not bad either.
FW Vinicius Junior, 7 - Solari again trusted the youngster ahead of more experienced options, and the 18 year old's mature run and pass gave Kroos the space to score his chip.