Actor Adam Astill auditioned for the role in August 2010. He was called back for a second audition to meet with the producers. In October he was offered the role and began filming in November. Astill had wanted a role in the show for some time prior to his casting, because he was impressed with the standard of material the programme produces. His schedule was light at first as they eased his character into the series. In early 2011 his workload increased as Dan's storylines developed. Astill's casting was publicised on 18 January 2011. He said he was thrilled to join and follow the "footsteps of so many brilliant characters." Whilst Campbell expressed her delight that Astill was playing the character. Dan's first episode was broadcast on 15 February 2011, which also featured fellow new character Sahira. Astill is currently contracted with the series until November 2011.

In early May 2012, Astill told Joanne Lowles from TVTimes that he was leaving the series. He said that he was pleased with Dan's exit storyline because he "becomes the happiest we've ever seen him, he's comfortable in his own skin and relaxed." He later told Digital Spy's Kilkelly that he had "loved" working on the show but wanted to pursue new projects. Although he did not rule out a return in the Future. While a BBC representative explained that the dynamic between Dan and Simon Marshall (Paul Nicholls) would develop and result in "Dan having to decide once and for all which path he follows". They added that Astill is a "brilliant actor" and had contributed much to Dan's storylines during his tenure.

Though the number of complaints were not publicised – The BBC defended the storyline explaining that, "Holby City aims to reflect real life in the setting of a medical drama and this means telling stories about characters from many different backgrounds, faiths, religions and sexualities. We approach our portrayal of same-sex relationships in the same way as we do heterosexual relationships and aim to ensure depictions of affection or sexuality between couples are suitable for pre-watershed viewing." Frances Ryan of The Guardian responded, "Whether said complainers thought that the onscreen depiction of straight people or indeed the interaction of humans generally was similarly a compliance to fantastical trends remains unseen".

Dan disrespected Chrissie's career aspirations once again and she became "slightly suspicious" of him. Hobley said there is no Future for the two of them. Though Astill wasn't so sure but said he hoped Dan would transform into a "bisexual predator — and no man or woman is safe from him." In July 2011, Astill began to worry about public opinion of Dan. He hoped viewers would realise that Dan was not "a bad person" but rather "a tortured soul." At this point Dan and Malick were a long way off romance. Any feelings he had were "buried so deep he refused to believe they exist."

Anthony D. Langford of gay media website AfterElton.com was left undecided in his view, by the storyline's beginning. He opined that Astill and Akingbola had chemistry, that the characters' scenes were "intense and combustible," and that the fight and following kiss were terrifically acting, due to the amount of "passion and heat and rage". However, he expressed concern that the same type of storyline had been attempted in soap operas on multiple occasions. He predicted that Dan would be in denial for week and cause fights with Malick. Langford concluded: "I suspect that Malick and Dan will eventually embark on a secret affair, Chrissie will find out, there will be more denials and fighting and at some point Dan will accept who he is. Still, despite the tired storyline, the characters are complex and appealing and the writing is solid enough to make me overlook that." Langford later said "Dan isn’t a very likable character" and is a "complete jerk" because of his sexuality issues. He also questioned Dan's medical skills, bemoaning it unrealistic that his "unethical behavior" has not been noticed within the hospital. He also admitted his confusion to why a "self-assured guy like Malick" would get involved with Dan. Though he praised Dan's revelation of his backstory. D Langford later said Dan's behaviour needed to be addressed because there was a danger the story would "lose its integrity."