NCIS is set to welcome back a beloved character in Monday's episode.

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Margo Harshman will appear in the upcoming instalment.

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The show's official Twitter account teased the episode.

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In the video, Sean Murray as Timothy walking alongside his wife, Margo, in a wheelchair.

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Fans were quick to react to the news.

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One person writing: "Finally! Nice to see Timothy's wife again!"

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While another added: "Yayyyyy!!! I've missed Delilah!"

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The episode, titled High Education, will see the team investigate the death case.

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The victim is also revealed to have had connections to Timothy's wife.

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The episode is set to air on CBS on Monday 2 January.

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