Duncan McColl, portrayed by Cameron Welsh, made his debut on the Australian soap opera Home and Away in July 1999. Initially auditioning for a guest role, Welsh's character became significant. His tenure was interrupted in 2000 due to a herniated disc, requiring a temporary replacement actor. After his recovery, Welsh returned to the role, with his scenes resuming in April 2000. He later reprised the character for a cameo in the show's 4000th episode in 2005, returning for a storyline involving Alf Stewart's birthday. McColl's portrayal earned Welsh a nomination for "Best New Male Talent" at the Logie Awards in 2000. The character's impact was noted by critics, with one highlighting his initial appearance and another describing a "long-awaited" kiss scene. McColl's departure from the show was also noted as a television highlight by one publication. Following his acting career, Welsh transitioned into a production role on Home and Away, with his experience playing McColl reportedly enhancing his understanding of the show's production.

Mitch McColl, brought to life by actor Cameron Welsh, first appeared on Home and Away in the episode airing on July 15, 1999. Welsh initially auditioned with the understanding that the role would be a guest appearance. However, the character's presence evolved, leading to a significant storyline. A medical issue in 2000, a herniated disc diagnosed in Welsh, necessitated a brief hiatus for the actor. During this period, Mitchell McMahon temporarily assumed the role of Mitch McColl. Welsh found the experience of seeing another actor play his character to be unusual. Upon his return, Welsh's portrayal of Mitch resumed airing from April 3, 2000, continuing the character's narrative arc.

In 2005, Cameron Welsh reprised his role as Mitch McColl for a guest appearance in Home and Away's 4000th episode. This return was centered around a storyline involving the birthday of long-standing character Alf Stewart. Welsh later transitioned behind the camera, becoming a producer for Home and Away. He reflected that his time acting as Mitch McColl provided him with valuable insights that aided him in his producing capacity, fostering a deeper comprehension of the series' dynamics and production requirements.

Cameron Welsh's performance as Mitch McColl garnered critical attention. In 2000, he received a nomination for the "Best New Male Talent" award at the Logie Awards, acknowledging his early impact on the show. Critics noted the character's significant presence from his first episode. Specific moments, such as a kiss between Mitch and Hayley, were highlighted as particularly engaging for viewers, described as "long-awaited" and featuring "lustful eyes." The character's exit was also recognized as a notable event in weekly television programming by at least one columnist.