Earlier today, we were treated to the news that one-time '30 Rock' guest star Salma Hayek would reprise her role as Elisa for the January 31 series finale, but the final episode might not have anything on the star-studded size of this Thursday's "Game Over." Not only will esteemed '30 Rock' guest stars Will Arnett, Steve Buscemi, Chloe Moretz and Megan Mullally reprise their respective roles, but joining them will be 'The Help's Octavia Spencer! Get a sneak peek at the big '30 Rock' returns tomorrow night inside!

'30 Rock's series finale might be the January TV event that has everyone talking, but tomorrow night's "Game Over" could prove its most star-studded yet. Continuing the trend of bringing pack prior guest stars for one last hurrah, the episode will see the return of Will Arnett's longtime Jack Donaghy rival Devon Banks, as well as 'Boardwalk Empire' star Steve Buscemi's eccentric private eye Len Wosniak.

The episode will see Jack recruiting Banks' help in taking control of Kabletown from fellow returning star Chloe Moretz' young Kaylie Hooper, while Tracy works on his Harriet Tubman movie with Octavia Spencer in the lead role. Megan Mullally will also appear in the outing, presumably reprising her role as Liz's adoption agent from an earlier season.

Take a look at the photos from this Thursday's all-new '30 Rock' episode "Game Over," below, and tell us who you might like to see return before the series finale in the comments!

30 Rock Game Over Photos Will Arnett
NBC
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30 Rock Game Over Photos Will Arnett
NBC
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30 Rock Game Over Photos Octavia Spencer
NBC
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30 Rock Game Over Photos Steve Buscemi
NBC
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30 Rock Game Over Photos Chloe Moretz
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