I actually had a rough draft of a strip - in my notebook dating back to 1995 - showing Cassie's first day at work. Originally panel 4 would kick off the first TLT strip (and the first of a multipart storyline where she invents the time machine), but I decided to just do a quick one-page version of the time machine origin for the premiere.
TRANSCRIPTION COURTESY OF JOSEPH HOUK - "So why again are we going in early?" (CW) "I just wanna go back to the first day I worked here and make sure nothing gets too weird between Rodney and me. I don't know what I'm gonna do if he figures out I'm the one he slept with in 1991!" (BG) "Good luck!"  (CW, to herself as she closes the time portal) Okay... If I remember correctly, I should be meeting Rodney right about... now! (Gordo) "Hey Rodney, Wanda. This is Cassie Wells. She's a super-smart young lady who'll be joining us in R&D." (Past RO) "Pleased to meet you, Cassie!" (Past CW) "Hi!" (Wanda) "Welcome aboard!" (PRO, in the cubicles in back, holding his UT mug) "You know, you remind me of someone I met at a party back in the day. Are you...? [CW looks on in fear] NAH... You couldn't be..." [PCW is oblivious] (CW, whispering) phew!