Stephen Logan Sr. is a fictional character in the CBS soap opera The Bold and the Beautiful. The role was played by actor Robert Pine for guest appearances in 1988, 1994, 1997, 1998 and 2001. Actor Patrick Duffy replaced Pine and played the role from March to June 2006, from November 7, 2007 to January 11, 2008, from May 1 to May 15, 2008, and from June to December 2008. He will appear for two episodes on June 24 and 25, 2009.

Stephen had married Beth Henderson (Nancy Burnett) when they were both in college, and they had four children together - Stephen "Storm" Jr., Brooke, Donna and Katie. Stephen left Beth and abandoned his children when they were young, because he knew that in her heart Beth had never forgotten about her college sweetheart, wealthy fashion designer Eric Forrester ( John McCook), and Stephen never felt that he could measure up. Stephanie ( Susan Flannery) hired Conway Weston to locate Stephen to bring him to Los Angeles in an attempt to keep her estranged husband, Eric, away from Stephen's estranged wife, Beth. Stephen had been living in Arizona, and his daughters Donna (then played by Carrie Mitchum, now Jennifer Gareis) and Katie (then Nancy Sloan, now Heather Tom) had flown to there to beg him to come home. Neither Storm (then Ethan Wayne, now William deVry) nor Brooke ( Katherine Kelly Lang) were happy to see him after he had abandoned them years earlier, but he worked hard to get his family to forgive him, and saving Katie from choking at a family barbecue went a long way toward doing that. He and Beth eventually made up left town for Paris after Bill Spencer (James Storm) gave Stephen a cushy job in his overseass office, and neither knew that Brooke had helped convince them to go to keep Stephanie from telling her son Ridge ( Ronn Moss) that she knew all about Eric and Beth's affair.

Stephen and Beth would occasionally return for family events, but it wasn't until years later that Stephen disappointed his family once again. Massimo Marone ( Joseph Mascolo) contacted Stephen and offered him $5 million if he would convince Brooke to move back to Paris with he and his wife, Beth. Stephen initially wasn't interested, but Massimo threatened to make Brooke's life very unpleasant if Stephen didn't get her out of L.A. Stephen had a heart condition, and pretended it was much more serious than it actually was, which convinced Brooke to go to Paris. Beth was furious with him when she found out what was going on, and Brooke was devastated that her father had betrayed her yet again. She returned to her life in the United States.

Stephen finally returned to Los Angeles six years later, at the request of Ridge. He had run into Ridge months earlier when Ridge was in Paris, and Ridge had been keeping him up to date on what was happening in Brooke's life. Originally he was there with the idea of convincing Brooke not to let what he did to her affect her life and to prod her into remarrying Ridge (which was why Ridge brought him to town), but had an abrupt change of heart after learning that Ridge had taken advantage of Brooke the night she had accidentally overdosed on sedatives. He soon became an ardent supporter of Brooke's new lover, Nick Marone ( Jack Wagner), and it wasn't long before he began an affair with Nick's mother, Jackie ( Lesley-Anne Down), and then found himself intrigued by Ridge's ex-wife Taylor Hamilton ( Hunter Tylo). He even admitted to Jackie that he and Beth had inevitably divorced in part because, to Beth, he just wasn't the man that Eric was. When Brooke learned of her father's flings with her long-time rival, Taylor, and her soon-to-be mother-in-law, Jackie, she ordered her father out of her life and Stephen returned to Paris.

In November 2007 Stephen came back to Los Angeles once more, after Donna requested it. She told Stephen that Brooke was raped, and Brooke finally admitted that Stephanie was responsible for luring the rapist to Brooke's house. At that point, Stephen became outraged and showed up at Stephanie's hotel room door after sending her a startling gift--a dead bird on a silver platter (much like the bird in the cage that Brooke's rapist gave to her before telling her that "she was serving her goodies up to him on a silver platter"). After arguing with her and threatening to throw her off the balcony, he decided to confront Eric Forrester, but ended up seeing Eric and Donna in bed together. Despite his feelings against Eric (because he knew that his wife Beth had always loved Eric instead of him), he finally accepted their relationship because Donna and Eric assured him that they were in love.

Stephen's son, Storm, finally spoke with him following years of tension, and while Stephen admitted that it was wrong to have left his children, he lashed out at Storm for not being there when Brooke was raped and not knowing about Donna and Eric's affair. An enraged Storm then shot Stephanie and framed Stephen for the crime. When Stephen found out, he was sympathetic and remorseful that he had driven Storm to this. Brooke told Stephanie that it was Storm - not Stephen - who shot her, and Stephanie eventually agreed reluctantly to have the charges against Stephen dropped and stay silent about Storm's guilt.

After Storm shot himself and with Katie being in the hospital Stephen comes back to take care of his family.

Recently, Stephen had to deal with the fact that Beth has had some small strokes, and that she's forgetting who she was. At first he was a major suspect in the poisoning of Eric Forrester but the culprit was revealed to be Eric's ex-sister-in-law Pamela Douglas. Stephen and Beth have also decided to try for a reconciliation.

• Accepted $5 million from Massimo to convince Brooke to go to Paris, to get her away from Ridge.

Robert Pine

Contract : 1988

Guest : 1994, 1997, 1998

Recurring : 2001

Patrick Duffy

Contract : April to June 2006 & November 7, 2007 to January 11, 2008

Recurring : May 1 to May 15, 2008, June 20, 2008 to December 2008

Guest : June 24 and 25 2009

Logan, Stephen