Red vs. Blue (2003)

S2E7 Nobody Likes You

The Blues are unwilling to take Doc back from the Reds, worried that he could be a double agent. Frustrated, the Reds decide to head back to their own base. When Doc tries to accompany them, they abandon him, leaving him stranded. He makes another attempt to rejoin the Blues, but they still harbor doubts about his loyalty and turn him away once more.