Sullivan's Crossing is coming back with a major love triangle as Maggie finds her genuinely torn between boyfriend Cal - and secret husband Liam. The CW shared a teaser for season 4 on Wednesday, February 25, which showed Maggie (Morgan Kohan) having to explain to Cal (Chad Michael Murray) why she didn't tell him about Liam (Marcus Rosner). In addition to Cal and Liam facing off while wood chopping, Liam appeared to grow closer to Maggie as they shared a tender moment in the present timeline. "The vow she made or the life she chose," read the message in the sneak peek.