TOWIE star Arg was suspended from the ITVBe series last autumn due to his wild behaviour and he has since spent time in rehab.
In new sneak peek pictures of tomorrow night's episode, Lydia can be seen with her hands over her eyes after coming face-to-face with Arg at the cast's Full Moon party.
Earlier in the show, Lydia has a heart-to-heart with her sister Georgia about how she really feels about her ex - but we will have to wait and see to find out what she has to say...
Jazz singer Arg first sparked concern in August when he failed to turn up for a scheduled flight to Majorca, ahead of a club appearance. The Met Police even launched a missing persons appeal, however Arg was later found asleep in a hotel room.
Months later, Arg was caught on camera having drunkenly vomited down his T-shirt while on a plane to Ibiza with his co-stars. Soon after, TOWIE bosses took the step of suspending him from the rest of the series and the Christmas special.
Following his suspension, Arg spent the festive period in rehab and has since emerged looking much fitter and healthier. He is following a new fitness regime, which has impressed his co-stars.
Earlier this month, Lydia and Elliott Wright spoke out and said they and their cast mates were "praying" that Arg would be able to return to TOWIE during the 14th series.
They got their wish, as Arg was pictured filming scenes for the reality show this week.
TOWIE, 10pm, ITVBe, Sunday 1 March
TOWIE: Series 13 recap: