Star Trek: Discovery Season 2 continues to plow forward into February with “An Obol for Charon” this week, and today we’ve got a collection of new images from the upcoming episode which features the arrival of Number One and the return of Jett Reno!

The first officer of the USS Enterprise beams over to the Discovery this episode, marking the first reappearance of Number One (Rebecca Romijn) in Trek since 1966’s “The Menagerie.” While the character has been featured in several tie-in Original Series novels, second-in-command has been out of the picture since the very beginning of the franchise.

Also returning in “Charon” is Commander Jett Reno (Tig Notaro), who was rescued from the downed USS Hiawatha in the season opener. Naturally, the engineer is pictured in the Discovery engine room, seen with a previously-unseen bit of spore drive tech in hand.

'Star Trek: Discovery' Episode 204 - 'An Obol for Charon' 1 of 7

Meanwhile, Stamets (Anthony Rapp) continues to help Tilly (Mary Wiseman) after extracting the spore-based life form from her body in last week’s “Point of Light,” as the alien blob seems to have attached itself to the young ensign’s right arm.

Finally, Captain Pike and his bridge crew face a crisis as the Discovery operates at red alert.

In case you missed it, here’s the preview for “An Obol for Charon” — and you can find our review of Discovery‘s next episode right here at TrekCore later this week.

“An Obol for Charon” debuts Thursday on CBS All Access and Space, and will arrive on Netflix Friday morning for Star Trek: Discovery viewers outside of North America.