NBC is adding a double dose of guest stars for two of its returning dramas next season, both of whom are coming from TNT. Ray Romano will join the cast of Parenthood for several episodes while permanent sci-fi guest star Mark Pellegrino has landed a role on the second season of Grimm.

Romano, known for Everybody Loves Raymond and TNT's Men of a Certain Age, will play a photographer and former photo journalist on Parenthood who sets his sights on Lauren Graham's Sarah Braverman. This will clearly cause some conflict for her relationship with Mark (Jason Ritter) and produce one of the strangest love triangles on TV. Romano is 54, Graham is 45 and Ritter is 32.

Meanwhile, Pellegrino will guest star on an episode of Grimm as an old friend of Hank's whose daughter is missing. The character also happens to be a coyote-like creature.

Pellegrino has a long track record of guest starring on sci-fi and fantasy shows, as Jacob on Lost, Lucifer on Supernatural and Bishop on Being Human. He's also had key roles on Dexter and TNT's The Closer.

As was previously announced, Grimm's second season will get an early debut, starting Mondays, August 13 at 10pm before moving to its regular time slot, Fridays at 9pm, starting September 14. Parenthood will begin its fourth season Tuesday, September 11 at 10pm.


(Images courtesy of WENN)