TORONTO -- Stuart Margolin, Ona Grauer, Theresa Joy and Toby Proctor have joined the cast of "The Bridge," the CBS and CTV cop drama shooting in Toronto.

Margolin, who plays the father of lead character Frank Leo (Aaron Douglas), also will direct an episode of the police procedural from Brass Prods., 990 Multimedia Entertainment and E1 Entertainment.

The other new castings will see Grauer play a city prosecutor and Joy tackle the role of a feisty police constable while Inga Cadranel and Genadijs Dolganovs will play detectives.

In February, CBS agreed to co-finance 11 one-hour episodes of the Canadian procedural drama as an international co-production with CTV after it found success with another of the Canadian broadcaster's cop dramas, "Flashpoint."

Written and executive produced by Alan Di Fiore, "The Bridge" is the brainchild of Craig Bromell, a former Toronto police officer who partnered with Di Fiore to develop the Canadian drama at CTV.