"SNL" writer will premiere as cast member Oct. .25
Surprise guest Kristen Wiig also shines in poignant episode of NBC's sketch comedy show
Former 'Update' anchor Cecily Strong shows no hard feelings as she helps her replacement
The long-time cast member returns to replace the iconic voice of the program
The eight-year "Saturday Night Live" vet will be joined by musical guest Hozier
Mike O'Brien is sent back to the writing staff
The Staten Island native is one of the youngest to ever join the cast
Cast member will be replaced by "Daily Show" correspondent Michael Che on the Weekend Update desk for the upcoming season
Comedian Michael Che takes her spot as "Saturday Night Live" boss seeks new identity for "Weekend Update"
Che will join Colin Jost behind the "Weekend Update" desk for the upcoming 40th season
Plus, Nasim Pedrad is officially leaving "SNL" for Fox comedy "Mulaney"
The comedian tweeted the news on Monday
Comedian plays to his strengths; cold open on Obamacare falls flat
Jost admits you can "go crazy" if you focus two much on the show's past
Beck will serve as musical guest