This week will feature two episodes. Episode 7 will cover Steiner Trees. Episode 8 (previously Episode 7) will feature Makoto Soejima (rng_58). This will make up last week's episode that was cancelled due to technical difficulties.
You can find more info here: http://algorithms-live.blogspot.com/2017/02/episodes-7-and-8-steiner-trees-and.html
Update: Episode 8 will be starting soon. Sorry for the delay and confusion! Here is the link: https://www.youtube.com/watch?v=UrgYcfIT42M