Titus Welliver, Reed Diamond

White Collar has snagged The Good Wife's Titus Welliver and 24 vet Reed Diamond for guest-starring roles this coming season, TVGuide.com has learned exclusively.

Welliver, 51, will play Senator Terrence Pratt, a prominent politician with ties to Neal's crooked cop father. Sen. Pratt will do whatever it takes to ensure his past remains hidden. Diamond, 44, will portray Cole Edwards, a well-known and ruthless New York construction magnate with strong political ties. Additionally, fellow 24 alum and Sons of Anarchy actress Sprague Grayden will pop up this season as a younger version of Ellen (Judith Ivey), Neal's old family friend who was introduced in the Season 3 finale.

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Welliver is best known for playing another politician — former State's Attorney Glenn Childs on The Good Wife — and has also enjoyed stints on Deadwood, CSI and Lost as "The Man in Black." Diamond, who recurred on the final season of 24, also appeared in several episodes of the final season of Desperate Housewives and currently stars on Franklin & Bash.

The new season of White Collar premieres Tuesday at 9/8c on USA.  

How do you think Sen. Pratt is connected to Neal's dad?