Major Crimes is back in session! The TNT drama is filming its next episodes and Tony Denison revealed a guest to the set on Twitter.

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On Wednesday, Denison tweeted a photo of himself, star Mary McDonnell (Sharon Raydor) and actor William Russ. "How great! William Russ on the set visiting with Miss @MaryMcDonnell10 and me! What a great guy! #MajorCrimes"

Russ is probably best known for his role on Boy Meets World by younger fans. Major Crimes is slated to come back for the second part of Season 3 in November. When asked recently about what fans can expect, Denison hinted at more plotlines between his character Lt. Flynn and McDonnell's Raydor., Denison TV Equals on Tuesday that fans can expect really cool "Shandy moments" between the two. "There will be some plots along those lines." Adding that fans "won't be disappointed."

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Recently Pretty Little Liars star Torrey DeVitto, who plays Melissa on the show, was cast as Lt. Flynn's daughter, Nicole, TV Line reported last week. She will appear in the episode called "Acting Out" and it's set to air on Dec. 8.

The site describes her as "professional, endearing" and wielding "a touch of Flynn's edge and sense of humor." Dension had also recently said that this daughter may his character and Raydor closer together.

"I was told that when the character playing my daughter shows up that there might be more of Flynn going to Sharon as an ally to help with that and dealing with whatever it is, but I don't know what it is," Denison told MajorCrimesTV  about the "Shandy" relationship. "But whatever it is will probably just serve to draw us closer together."