Dr. Robert Chase is a fictional character on the Fox medical drama House. He is portrayed by Jesse Spencer.

His character was a part of the team of diagnosticians who worked under Gregory House until the end of the third season when House fires him. Robert Chase is the longest-serving member of House's staff (he was hired approximately one year before the Pilot episode, as revealed in a deleted scene). Chase has been attracted to Allison Cameron since the beginning of the show and embarks on a romantic relationship with her in "Human Error".

Chase marries Cameron in the season 5 finale, "Both Sides Now". An Australian, Chase is portrayed as an eager fellow of House during the first 3 seasons, often supporting his opinions and carrying out his orders without question. He was raised Catholic, and in the Season 1 episode "Damned If You Do," it was revealed that he attended Seminary school before becoming a doctor.

His reasons for leaving the Seminary are not entirely clear, but it has been asserted that while there he "failed" his test of faith. He seems to trust House the most and sometimes takes part in House's morally questionable plans when the other members of the team have refused, showing a situational application of ethics and a flexible stance on morality. This leads to tension between Chase and Foreman, who is quick to disagree with House and prove him wrong.

Chase is regarded by most characters as someone who will do anything to protect his job. This is mostly due to an incident in season one when Chase, fearing for his job because House had yelled at him, told Edward Vogler of House's illegal actions.

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